Determine whether the relation is a function: {(–1, –2), (–2, –3), (–3, –1)}. yes. one input results in one output. no. at least one output results in two inputs. yes. one output results in one input. no. at least one input results in two outputs.

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.