Question

The graph shows the number of paintballs a machine launches, y, in x seconds:

A graph titled Rate of Launch is shown. The x axis label is Time in seconds, and the x axis values are from 0 to 20 in increments of 4 for each grid line. The y axis label is Number of Balls, and the y axis values from 0 to 100 in increments of 20 for each grid line. A line is shown connecting points on ordered pair 4, 20 and 8, 40 and 12, 60 and 16, 80.

Which expression can be used to calculate the rate per second at which the machine launches the balls?

fraction 80 over 4
fraction 20 over 4
fraction 4 over 80
fraction 4 over 20

Answer 1

Answer:20/4

Explanation:

Answer 2

Per the chart the rates are 20 balls in 4 seconds ( 20 over 4), 40 balls in 8 seconds ( 40 over 8), 60 balls in 12 seconds ( 60 over 12) and 80 balls in 16 seconds ( 80 over 16).

The answer B. 20 over 4