The graph shows the number of sprays an automatic air freshener dispenses, y, in x minutes:
a graph is shown. on the x-axis, the values are from 0 till 150 in increments of 30 for each grid line, and on the y-axis, the values are from 0 to 10 in increments of 2 for each grid line. the title of the graph on the x-axis is time in minutes, and the title on the y-axis is number of sprays. a line is shown connecting ordered pairs 30, 2 and 60, 4 and 90, 6 and 120, 8. the title for the graph is dispense rate.
which expression can be used to calculate the rate per minute at which the air freshener dispenses sprays?
fraction 30 over 2
fraction 2 over 30
fraction 30 over 8
fraction 8 over 30

²/₃₀  

Step-by-step explanation:

The dispense rate is the number of sprays divided by the number of minutes.

rate = sprays/minutes

That automatically eliminates Options A and C, because the number of sprays is less than 10.

Option D is wrong, because at 30 min the number of sprays is 2.

rate = 2 sprays/30 min or ²/₃₀ sprays/min

table 3 represents a direct variation function. : )

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,