What is the propertys that i use in this i need th answer fast and thanyous

a. she will receive a refund of $278.

step-by-step explanation:

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

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.