actmath lnes-140808094555-phpapp02
TRANSCRIPT
PowerPoint Presentation
ACT MATH(GEOMETRY)LINES
What is the formula for the distance of a line?
What is the formula for the distance of a line?
What is the formula for the distance of a line?
What is the formula for the distance of a line?
What is the formula for the distance of a line?
What is the formula for the distance of a line?
Lets ask that again:
Lets ask that again:What is the formula for the distance of a line?
Lets ask that again:What is the formula for the distance of a line?
Say it out loud.
One more time:
One more time:What is the formula for the distance of a line?
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
What is the distance between point A and Point B? (8,2)
(4,-1)
The distance between Point A and Point B is 5 units
Last time: What is the formula for the distance of a line?
What is the formula for the midpoint of a line?
See if you can say it before going to the next slide.
Did you get it right?
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
What is midpoint between these two points? (8,2)
(4,-1)
The Midpoint
What is the formula for a line?
What is the formula for a line?
What is the formula for a line?This is the slope which usually is a fraction
What is the formula for a line?This is where the line crosses the Y Axix
What is the formula for a line?If the y intercept is 1 then the line goes through the Y axis at 1.
What is the formula for a line?If the y intercept is 1 then the line goes through the Y axis at 1.
1
What is the formula for a line?If the y intercept is 2 then the line goes through the Y axis at 2
2
What is the formula for a line?If the y intercept is 3 then the line goes through the Y axis at 3
3
What is the formula for a line?If the y intercept is 4 then the line goes through the Y axis at 4
4
What is the formula for a line?If the y intercept is 0 then the line goes through the Y axis at 0
0
Lets go back to this formula
Lets go back to this formula
1The slope is always a fraction.
Lets go back to this formula
1Lets say the slope is 1/2
Lets go back to this formula
1Lets say the slope is 1/2
Lets go back to this formula
1
Lets go back to this formula
1This is the rise
Lets go back to this formula
1This is the riseOver the run
Lets go back to this formula
1rise1
Lets go back to this formula
1run12
1Lets go back to this formula
run12
1Lets go back to this formula
12
12
Lets go back to this formula
Lets go back to this formula
If the y intercept goes to 0 watch what happens
Lets go back to this formula
If the y intercept goes to 0 watch what happens
Lets go back to this formula
If the y intercept goes to 0 watch what happens0
Lets go back to this formula
If the y intercept goes to 2 watch what happens0
Lets go back to this formula
If the y intercept goes to 2 watch what happens0
Lets go back to this formula
If the y intercept goes to 2 watch what happens2
Without going to the next slide can you say what the formula for a line is?
Without going to the next slide can you say what the formula for a line is?Did you get it right?
What does the m mean?
slope
slope1
12
slope1
12
rise1
slope1
12
run2
slope1
What does the b mean?
Y - intercept1
12
12
Y - intercept1
12
12
Where the line crosses the Y axis1
12
12
Where the line crosses the Y axis
12
12
1
What do parallel lines have in common?
Lets go back to this formula
0
Lets go back to this formula
0
Lets go back to this formula
01
Lets go back to this formula
01
012
All these slopes are the same because the lines are parallel
012
All these slopes are the same because the lines are parallel
012
What is the slope of a perpendicular line to the line below?
What is the slope of a perpendicular line to the line below?
Just flip the slope and then multiply by -1
What is the slope of a perpendicular line to the line below?
Just flip the slope and then multiply by -1
What is the slope of a perpendicular line to the line below?
Just flip the slope and then multiply by -1
What is the slope of a perpendicular line to the line below?
What is the slope of a perpendicular line to the line below?
What is the slope of a perpendicular line to the line below?
What is the slope of a perpendicular line to the line below?