Question

Find f(3) and find one value of x for which f(x)=2.

Answer 1

f(3)=-4; x=1

Explanation:

Just use the graph

Answer 2

`\huge\boxed{f(3)=-4}\\\huge\boxed{f(1\ \textsf{or}\ 4)=2}`

For this question, we just need to look at the graph.

Part a

`f(3)=\ ?`

Go to
`3` on the x-axis and see what value from the y-axis it intersects with.

It's
`-4`, right at the bottom of the little valley there.

Part b

`f(?)=2`

For this part, we do the opposite. Go to
`2` on the y-axis and find one value it intersects with from the x-axis.

You can go with either
`1` or
`4` here.