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Can someone please explain #2 to me i’m so confused about how i got this answer???

Can someone please explain #2 to me i’m so confused about how i got this answer???-example-1
User Zzzzz
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Problem 2, part (a)

We locate -1 on the x axis. Then move up or down until reaching a marked point. In this case we move down to arrive at (-1,-2)

The x input x = -1 leads to the y output y = -2

Therefore, f(-1) = -2

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Problem 2, part (b)

We follow the previous process in reverse. This time we start with the output, and we need to find which input(s) will get us there.

Draw a horizontal line through 3 on the y axis. This horizontal line crosses the marked points (0,3) and (2,3).

We can say that x = 0 leads to y = 3; also x = 2 leads to y = 3 as well.

In other words, f(0) = 3 and f(2) = 3

The two solutions to f(x) = 3 are x = 0 and x = 2

User Darkngs
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