The equation of a line in slope-intercept form, is:
[tex]y=mx+b[/tex]
From the graph, we can see that the y-intercept is equal to 0, and since the rate of burning calories is 6.5 calories per minute, that value corresponds to the slope of the line. Therefore, if y represents the number of calories and x represents the time measured in minutes, then:
[tex]y=6.5x[/tex]
