CPM Homework Help : AC Problem 11-21

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11-21.

If $f\left(x\right)=x^2$ , then $f\left(4\right)=4^2=16$ . Find:

$f\left(1\right)$
Hint (a):
Substitute $1$ for $x$ .
Answer (a):
$f\left(1\right)=1^2=1$

$f\left(-3\right)$
Hint (b):
Substitute $-3$ for $x$ .
Answer (b):
$f\left(-3\right)=\left(-3\right)^2=9$

$f\left(t\right)$
Hint (c):
Refer to parts (a) and (b).
Answer (c):
$f\left(t\right)=\left(t\right)^2=t^2$

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