Answer
$\text{a) }
f(50)\approx2
\\\text{b) }
x\approx125$
Work Step by Step
$\bf{\text{Solution Outline:}}$
Use the information in the given graph.
$\bf{\text{Solution Details:}}$
To estimate $
f(50)
,$ find the value of $y$ when $x=
50
.$ Based on the graph, then $
f(50)\approx2
.$
To estimate $
f(x)=2.5
,$ find the value of $x$ when $y=
2.5
.$ Based on the graph, $
x\approx125
.$
The answers are
\begin{array}{l}\require{cancel}
\text{a) }
f(50)\approx2
\\\text{b) }
x\approx125
.\end{array}
