Answer:

Step-by-step explanation:
The gradient = change in y / change in x
When the x value increases by 1, the y value decreases by 2 so -2 / 1 = -2
The y intercept is 4, so it is +4
Answer:
X= 20
Step-by-step explanation:
4x + 8 = 88
4x +8 - 8 = 88 - 8
4x = 80
4x/4 = 80/4
X = 20
Given:
f(x) = 4x² + 12
g(x) = x - 1
Therefore
(f . g)(x) = 4(x - 1)² + 12
= 4(x² - 2x + 1) + 12
= 4x² - 8x + 16
(f . g)(3) = 4*9 - 8*3 + 16 = 28
Answer: 28