Question

Write an equation of the form y=mx for the pairs (-1,4) and (1,-4)

Answer 1

Y = mx
We just need to find the slope:

y2 - y1 / x2 -x1 = -4 - 4 / 1 - - 1 = -8/2 = -4/1 = -4

so:  y = -4x

Hope that helps! :)