You would want to find the average rate of change to find how much y = ?x is. So we would take two coordinates, whichever ones : (-4, -6) and (-2, -3) and find the average rate of change. The following is the formula:
[tex] \frac{y2-y1}{x2 - x1} [/tex] : Which, when the points are applies, would make it :
[tex] \frac{-3 - (-6)}{-2 - (-4)} [/tex] : And simplified, that would become :
[tex] \frac{3}{2} [/tex] : and when this fraction is converted into a decimal, it would be 1.5. y = 1.5x
