Choose the best interpretation for the slope.
A. The slope indicates the mean weight.
B. The slope indicates the mean miles per gallon.
C. The slope indicates the mean change in miles per gallon for an increase of 1 pound in weight.
D. The slope indicates the ratio between the mean weight and the mean miles per gallon.
E. It is not appropriate to interpret the slope because it is not equal to z.

Slope or gradient is basically used or we can say considered by the mathematicians and other professionals to relate any two quantities or events in a given time frame. As there are some of the best interpretation which are suitable for defining the term slope in a more proper sense which are as follows:

As, the ratio between the mean weight and the mean miles per gallon of fuel can be taken as the best interpretation to define the slope or any gradient to a professional in a given time.

The answer is D. The slope indicates the ratio between the mean weight and the mean miles per gallon.