Question

this graph shows a function.
what is the value of $3f(-1)-2f(1)+f(3)$?

Explanation:

Step1: Find $f(-1)$ from graph

$f(-1) = 0$

Step2: Find $f(1)$ from graph

$f(1) = 2$

Step3: Find $f(3)$ from graph

$f(3) = -2$

Step4: Substitute into expression

$3f(-1)-2f(1)+f(3) = 3(0) - 2(2) + (-2)$

Step5: Calculate final value

$0 - 4 - 2 = -1$

Answer:

$-1$