a
step-by-step explanation:
yes because there is exactly one y value for every x value
for function there can't be more than one value for every x value
really really sorry if i'm
-12 -5(x + 4) = 3x
-12 - 5x - 20 = 3x
-12 - 20 - 5x = 3x
-32 - 5x = 3x
+ 5x + 5x
-32 = 8x
8 8
- 4= x
d. corresponding side lengths in similar triangles are proportional in length.