Question

3. What is the slope of the line passing through (15,-5) and (3, -8)?

Answer 1

M= -8 - -5/ 3 - 15= -8+5/3-15= -3/-12 = 3/12 = 1/4 


The slope is 1/4. 
The slope formula is m=y2-y1/x2-x1. I plugged in -8=y2, -5=y1, 3=x2, and 15=x1. Then I solved it.

Answer 2

-5--8 3
-------= ---
15-3 12