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A student was interested in the ratio of boys to girls in classes at her school. She randomly selected $10\text{ classes}$ and found the least squares regression line of this data to be $\hat { g } = 23.2-1.7b$, where $b$ is the number of boys in the classroom,​ and $g$ is the number of girls in the classroom.

Which of the following best describes the meaning of the slope of the least squares regression line?

A

For each additional boy, the estimated number of girls in the classes decreases by $1.7$.

B

For each additional boy, the estimated number of girls in the classes increases by $23.2$.

C

For each additional girl, the estimated number of boys in the classes decreases by $1.7$.

D

For each additional girl, the estimated number of boys in the classes increases by $23.2$.

E

The slope has no meaning in this case.

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