Martina is making ramps of different lengths. The ramps are made with rectangular and square wooden boards. The relationship between the length of the ramp in feet, f(n), and the number of square boards used, n, is represented by the function below.

f(n) = 12n + 5 , where 8 ≤ n ≤ 10

Which statement is correct about the range of the length of the ramp for the given domain?

A. It varies from 8 to 125.

B. It varies from 101 to 120.

C. It varies from 101 to 125.

D. It varies from 120 to 125.

Question

Martina is making ramps of different lengths. The ramps are made with rectangular and square wooden boards. The relationship between the length of the ramp in feet, f(n), and the number of square boards used, n, is represented by the function below. 

f(n) = 12n + 5 , where 8 ≤ n ≤ 10 

Which statement is correct about the range of the length of the ramp for the given domain? 

A. It varies from 8 to 125. 

B. It varies from 101 to 120. 

C. It varies from 101 to 125. 

D. It varies from 120 to 125.

btaylor · Answer

the range is the limits of the y-values, or here f(n).
So at the lower limit, f(8) = 101
at the upper limit, f(10)= 125
so the range varies from 101 to 125