Question

use the following function rule to find f(-5).
f(x) = 3|x|
f(-5) = \boxed{}

Explanation:

Step1: Substitute $x=-5$ into function

$f(-5) = 3|-5|$

Step2: Evaluate absolute value of $-5$

$|-5| = 5$

Step3: Calculate final product

$f(-5) = 3 \times 5$

Answer:

15