Question

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

Answer 1

Answer:

f(3)=-4; x=1

Step-by-step 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.