Question

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

Answer 1

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

Answer 2

Fraction 4 over eighty