The box plots show the summer temperatures, in degrees Fahrenheit, in two cities.

Summer Temperatures in City A
2 box plots. The number line goes from 50 to 100. For summer temperatures in City A, the whiskers range from 55 to 90, and the box ranges from 60 to 85. A line divides the box at 80. For summer temperatures in City B, the whiskers range from 50 to 90, and the box ranges from 60 to 80. A line divides the box at 70.
Summer Temperatures in City B

Linda is trying to decide which city to visit. She likes the summer temperature to be around 75 degrees Fahrenheit. Which city she should visit?

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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."

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,