Chapter 2.6, Problem 72E

HOW DO YOU SEE IT? The graphs labeled $L_1,L_2,L_3,$ and $L_4$ represent four different pricing discounts, where $p$ is the original price (in dollars) and $S$ is the sale price (in dollars). Match each function with its graph. Describe the situations in parts $\left(\text{c}\right)$ and $\left(\text{d}\right)\text{.}$

$\left(\text{a}\right)$ $f\left(p\right):\text{A}50\%$ discount is applied.

$\left(\text{b}\right)$ $g\left(p\right):\text{A\$}5$ discount is applied.

$\left(\text{c}\right)$ $\left(g\circ f\right)\left(p\right)$

$\left(\text{d}\right)$ $\left(f\circ g\right)\left(p\right)$