A machine that drills holes for wells drilled to a depth of -72 feet in one day (24 hours).
If the machine drilled at a constant rate, what was the
depth after 15 hours?

true !

step-by-step explanation:

answer: answer is b.

[m < b = 120º]

step-by-step explanation:

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.