Question

Writing a Linear Equation

Quick
Check
Use the work shown below to write the equation for a line Wha
that passes through the points (-5,0) and (-1, -8).
1. Use slope formula to find slope:
O!
-8-0 -8
m=-1 - (-5) = 45
8 = -2
.
What is the answer

Answer 1

Explanation:

First find the slope of the line that passes through the points (-5,0) and (-1, -8). Notice how x increases 4 units from -5 to -1 and y decreases 8 units.

Thus, the slope of this line is m = rise / run = -8/4, or m = -2.

Another way to look at this:

change in y - 8 - 0

m = -------------------- = ------------ = -2

change in x -1 - (-5)

Please note: m=-1 - (-5) = 45

8 = -2 is not correct; 8 cannot equal -2.