High School Grades of First-Year College Students Forty-seven percent of first-year college students enrolled in 2005 had an average grade of A in high school compared to 20 percent of first-year college students in 1970. Choose 6 first-year college students at random enrolled in 2005. Find the probability that

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- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

4

step-by-step explanation: