Answer:
D. 32
Step-by-step explanation:
For this problem, we simply plug -9 in for x in f(x):
⇒ 
Thus, the answer is D. 32.
Hope this helps!
Answer:
Six cents per square inch
Step-by-step explanation:
Rearrange the given equation in slope intercept form

slope of the required line is

equation is given by
78 gallons is the same as 312 quarts