A linear function contains the following points (0,-1) (3,8)

The answer is d.
to find the slope you can do y2-y1/x2-x1
8-(-1)/3-0= 9/3 or 3
you can then put one of the points into the slope intercept form y=mx+b or 8=3(3)+b
you get 8=9+b. you subtract 9 from both sides to get -1=b. y intercept means that the point is (0,-1)

Basic algebra equation. first set up your equation: divide out 9.and now you are left with 2x + 4 = 8.