This table shows the distances needed to stop a car on dry pavement in a minimum length of time for various speeds. Reaction time is assumed to be 0.75 s.

a. Construct a scatter plot of these data.
b. Find the equation of a parabola that fits the points and graph it.
c. Find the residuals for this equation and the root mean square error.
d. Predict the stopping distance for 56.5 mi/h.
e. How close should your prediction in 13d be to the actual stopping distance?

Transcribed Image Text:

Speed (mih) 10 | 20 | 30 | 40 | 50 | 60 | 70 Stopping distance (ft) 19 42 73 116 173 248 343