alg1 7.8 point-slope form
DESCRIPTION
TRANSCRIPT
Algebra 1
Lesson 7.8
Point-Slope Form
Slope-Intercept Form
Table Discussion
Slope
Standard Form
Given Tool
Slope
Formula
Standard
Form
Slope-
Intercept
Form
?pointpoint
y-interceptslope
x-intercept
point
Ultimate Goal:
With given information...
Know the name of the line,
and be able to graph it
y = mx + b y = mx + b
Slope Formula Slope-Intercept Form
Standard Form Point-Slope Form
Variations of Point-Slope Form:
y - y1 = m(x - x1)y - y0 = m(x - x0)y - y = m(x - x )
point: (-1,3) slope: 3Given:
y - y1 = m(x - x1)
point: (-3,-1) slope: 2y - y1 = m(x - x1)
Given:point: (-4,-3) slope: 2y - y1 = m(x - x1)
Given:
DO IT BACKWARDS!
Given: Point-Slope form, Find: slope & point
BACKWARDS!
y - y1 = m(x - x1)
Slope: Point:
y - 3 = (x + 2)34
You're Turn: "Your"
SMOTD
Slope: Point:
y + 4 = (x - 9)12
A DJ Company charges a $200 set-up fee, then $50 per hour. The table below represents the cost per hour including the set-up fee.
Hour(x) 1 2 3 4 5 6Cost(y) 250 300 350 400 450 500
y - y1 = m(x - x1)
http://www.youtube.com/watch?v=DWw-g5F6NgM
4:57
Homework: