Answer
a) $G(10)=69$
b) underestimated by $2$ percents
Work Step by Step
using the formula of $G(x)=-0.01x^2+x+60$
a. $G(10)=69$
b.it underestimates the data shown in the bar graph by $2$ percent
Use the formula of $$G(x)=-0.01x^2+x+60$$
a) Calculate: $$G(10)=-0.01(10^2)+10+60=69$$
b) Because $69<71$, it means that $G(10)$ underestimates the data shown in the bar graph by $71-69=2$ percents.
