Answer:
- f(5) = -2
- If f(x) = -1 then x = 3 and x = 6
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Step-by-step explanation
To compute f(5), first locate 5 on the x axis. Draw a vertical line through this marker. The vertical line crosses the curve at (5,-2) to indicate x = 5 leads to f(x) = f(5) = -2.
In other words, we start at 5 on the x axis, move straight down to the curve, then bounce off to move horizontally to the y axis. Doing this should have you arrive at y = -2.
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The second part has us go in reverse of the previous method.
Draw a horizontal line through -1 on the y axis.
This horizontal line crosses the curve at (3,-1) and (6,-1)
Therefore f(3) = -1 and f(6) = -1.
It means when f(x) = -1, the solutions are x = 3 and x = 6