Find the inverse of function f. f(x)=9x+7 A. F-1(x)= -9x-7
B. F-1(x)= 1/9x-7/9
C. F-1(x)= 7x+9
D. F-1(x)= 7/9x-1/9

B

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = 9x + 7 ( subtract 7 from both sides )

y - 7 = 9x ( divide all terms by 9 )

y - = x

Change y back into terms of x with x = (x) , thus

(x) = x - → B

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

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