Answer:
y= -9x - 6
Step-by-step explanation:
As x goes up by 1, y goes down by 9. We know that this is linear, not exponential.
Pick two points to find m, the slope.
(-1, 3) and (0, -6)
-9/1 = -9 as predicted
y = -9x + b
Plug in another point, such as (-1, 3)
3 = 9 + b
b = -6
EQUATION:
y= -9x - 6
