Answer:
108 months old.
Step-by-step explanation:
Year = 12 months
9 Years = 9 x 12 months
9 years = 108 months.
Answer:

Step-by-step explanation:
'x = -3', when graphed, passes through the point (-3,7) and (-3,0).
Since the line passes (-3,0), the x-intercept is -3.
(-3, 7) lies on the equation.
I have attached a picture of the graphed equation.
'x = -3' should be the correct answer.