A statistics student is interested in the relationship
between the size of a pizza (the diameter measured in
inches) and its price. He collects a random sample of
pizzas from several local restaurants. He finds a linear
model to give the relationship between the size of the
pizza and the price. The equation of the line is ŷ=-8.1
+1.91x, where ŷ is the price and x is the diameter. The
residual plot is shown.
Based on the residual plot, is the linear model
appropriate?
O No, there is no clear pattern in the residual plot.
OYes, there is no clear pattern in the residual plot.
No, there is a clear pattern in the residual plot.
OYes, the residuals are relatively small.