SEC 8: WRITING THE EQUATION OF A LINE

Homework: Writing Linear Equations Worksheet

Learning Target: Students will write the equation of a line given a graph of any linear equation and apply it to real-world situations.

REVIEW: GRAPH THE EQUATION

y = -4x + 5

x

y

EX 2A: WRITE THE EQUATION OF THE LINE

Steps:1. Find the

slope.2. Find the

y-intercept.3. Write in

slope-intercept form (y=mx+b).

x

y

EX 2B: WRITE THE EQUATION OF THE LINE

x

y

EX 3A: FINDING THE Y-INTERCEPT WHEN YOU CAN’T SEE IT

Steps:1. Find the slope.2. Choose

another point on the line.

3. Substitute the slope and point into point-slope form.

4. Rewrite in slope-intercept form.

Point-Slope Form

x

y

EX 3B: FINDING THE Y-INTERCEPT WHEN YOU CAN’T SEE IT

Write the equation of the line.

x

y

REVIEW: FUNCTION NOTATION Create a DWW and then answer the following

Open Response.

Swine flu is attacking the North Pole. The function, S(t), below determines how many elves have swine flu where t = time in days and S = the number of people in thousands.

a. Find S(4).b. What does S(4) mean?c. Find t when S(t) = 3.d. What does S(t) = 3 mean?e. Write the equation, using

function notation, of this line?

x

y

HOMEWORK

Writing Linear Equations worksheet