7(b) The equation of the fitted line is: performance_score = 97.46 +? * speed_score

It seems like you're asking for the coefficient of the variable 'speed_score' in the linear regression equation for 'performance_score'. However, you haven't provided the coefficient value.

In a linear regression equation of the form y = a + bx, 'a' is the y-intercept and 'b' is the slope of the line, which is the coefficient of x. In your equation, 'performance_score' is the dependent variable (y), '97.46' is the y-intercept (a), and 'speed_score' is the independent variable (x). The '?' is where the coefficient (b) should be, which represents the amount 'performance_score' changes for each one-unit change in 'speed_score'.

To find this coefficient, you would typically use your dataset to perform a linear regression analysis. This analysis would give you the best fitting line to your data, and the slope of that line would be the coefficient you're looking for. Without the data or the results of that analysis, I can't provide the coefficient.