Let's expand both options, your friend's and yours, as shown below

Then, both equations are the same besides a constant that will not affect the zeros of the functions, as shown below

And

Both your friend and you are correct. The functions are the same with exception of a constant that multiplies the whole function (a scale factor); despite that, the zeros are the same for both functions
<span>f(x) = -4x + 2 or c is the answer
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-17+32+-9+0+52+12+-14= 56
56 ÷ 7 = 8
mean is 8
You can just divide each total earning by hours of work
A=12
B=10.5
C=13