How does f (x) = 9x change over the interval from x = 3 to x = 4?

Increases from 27 to 36

Step-by-step explanation:

The function f (x) = 9x is a linear function. It increases over the interval (-∞, ∞). It continues to increase over the interval x = 3 and x = 4. It changes from 9*3 = 27 to 9*4 = 36.

B. f (x) increases by 800%