You can put this solution on YOUR website! This problem is just a case of understanding what the notation means. You are given
that
.
f(x) = 4x - 3
.
Then you are asked to find f(-1). Notice that in f(x) the x has been replaced by -1 for x.
So what you are being told to do is replace x by -1 in the equation f(x) = 4x -3.
When
you make that replacement you get:
.
f(-1) = 4*(-1) - 3 = -4 - 3 = -7
.
So you can say f(-1) = -7 for this particular problem.
.
That's all there is to it. Hope that this helps your understanding of the problem
and the notation it involves.
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