Answer
The value of $f\left( 50 \right)$is 200 and 50 years old drivers have 200 per 50 million miles, which is represented in the coordinate system as$\left( 50,200 \right)$.
Work Step by Step
Consider the given function:
$f\left( x \right)=0.4{{x}^{2}}-36x+1000$
Substitute, the value of x as 50 in the above equation.
$\begin{align}
& f\left( 50 \right)=0.4{{\left( 50 \right)}^{2}}-36\left( 50 \right)+1000 \\
& =1000-1800+1000 \\
& =200
\end{align}$
Here, the coordinate of the point on the graph f is $\left( 50,200 \right)$. It indicates that if the age of the driver is 50, then a number of the accidents is 200 per 50 million miles.
Hence, the value of $f\left( 50 \right)$is 200 and 50 years old drivers have 200 per 50 million miles, which is represented in the coordinate system as$\left( 50,200 \right)$.
