Answer
The value of $f\left( 20 \right)$is 440 and 20 years old drivers have 440 accidents per 50 million miles, which is represented in coordinate as $\left( 20,440 \right)$.
Work Step by Step
Consider the given function:
$f\left( x \right)=0.4{{x}^{2}}-36x+1000$
Substitute, the value of x as 20 in the above equation.
$\begin{align}
& f\left( 20 \right)=0.4{{\left( 20 \right)}^{2}}-36\left( 20 \right)+1000 \\
& =160-720+1000 \\
& =440
\end{align}$
Here, the coordinate of the point on the graph f is $\left( 20,440 \right)$. It indicates that if the age of the driver is 20, then a number of accidents is 440 per 50 million miles.
Hence, the value of $f\left( 20 \right)$is 440 and the drivers have 440 accidents per 50 million miles.
