Question

Suppose you have a pitcher with a per plate appearance strikeout rate of
X = 0.39
The equation for the line of best fit for the graph that compares the relationship
between strikeouts per plate appearance and ERA is
y = -8.78x + 9.36
What is the pitcher's expected ERA? Round your answer to the nearest hundredth.

Answer 1

To determined the expected ERA we plug the strikeout rate in the equation of the line given, then we have:

$\begin{gathered} y=-8.78\left(0.39\right)+9.36 \\ y=5.94 \end{gathered}$

Therefore, the expected ERA is 5.94