The graph shows the number of paintballs a machine launches, y, in x seconds:
which expression can be used to calculate the rate per second at which the machine launches the balls?
80 over 4
20 over 4
4 over 80
n 4 over 20

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

addition

step-by-step explanation:

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