Answer:
Batting practice increases batting averages.
Step-by-step explanation:
By looking at the graph, we clearly see a trend, almost a straight line (if you regroup the points a bit) going up.
So, it's clear that batting practice increases batting averages; they're directly related. The more a player practices at bat, the better will be his average.
<u>Answers B and D </u>(best and worst batters) are not proved at all by the graph, since there's data higher than those two cases.