Is a linear model appropriate? The number, in thousands, of bacteria in a petri dish is given by the table below. Time is measured in hours. The table below shows enrollment,18 in millions of people,...

Is a linear model appropriate? The number, in thousands, of bacteria in a petri dish is given by the table below. Time is measured in hours.

The table below shows enrollment,18 in millions of people, in public colleges in the United States during the years from 2001 through 2005.

a. Plot the data points for number of bacteria. Does it look reasonable to approximate these data with a straight line?

b. Plot the data points for college enrollment. Does it look reasonable to approximate these data with a straight line?