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If f is a linear function such that f(7)...

If f is a linear function such that f(7)=5,f(12)=-6, and f(x)=23.7, what is the value of x?

A

-3.2

B

-1.5

C

1

D

2.4

Text Solution

Verified by Experts

The correct Answer is:
B
The slope of the line is `(-6-5)/(12-7)=-(11)/(5)`. An equation of the line is therefore `y-5=-(11)/(5)(x-7)`. Substitute 23.7 for y and solve for x to get x=-1.5. [1]
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