CPM Homework Help : CCA Problem 3-62

What is the equation of the line that has a $y$ -intercept of $(0,−3)$ and passes through the point $(−9,−9)$ ?

Step 1:

Use the two points to find the rise and the run. Then divide the rise by the run. That will give you the slope.

Step 2:

Substitute the slope for $m$ in the equation below. Then substitute the $y$ -coordinate of the $y$ -intercept for $b$ .

$y=mx+b$

Answer:

$y=\frac{2}{3}x-3$

Use the eTool below to help you complete the problem.
Click the link at right for the full version of the eTool: 3-62 HW eTool