Question

What is the equation of the line that passes through the points (-3, 2) and (-5, 8)?

3x - y = -11

3x + y = - 7

3x + y = 5

x + 3y = 3

Answer 1

You find the slope using the slope formula which is:

y2-y2/x2-x1 = 8-2/-5+3 = 6/-2 = -3

And now you have to find the y-intercept:

y=mx+b; (-3,2) , m=-3

2=-3(-3)+b
2=9+b
-7=b

=> y=-3x-7