Answer:
The estimated increase in the average number of students per classroom each year.
Step-by-step explanation:
In the equation y=0.56x+27.2, the value of x increases by 1 for each year that passes. Each time x increases by 1, y increases by 0.56, since 0.56 is the slope of the graph of this equation. Since y represents the average number of students per classroom in the year represented by x, it follows that, according to the model, the estimated increase each year in the average number of students per classroom at Central High School is 0.56.
