Interpret the Y-intercept of the data

DATA

Is a linear model appropriate for this data set?

Yes because "r" and "r2" is over 0.8, which makes it a strong regression.

Interpret the average rate of change of the data set.

The average rate of change is -7.596652174.

The Y-intercept is 407.40733333333.

How well does the linear regression line fit the data?

The regression line fits the data very well because a majority of the points are on or close to the line of best fit.