At a car repair shop, the cost of a repair depends on the time the mechanic works. which of the following shows this idea expressed in function notation?

a. time(number of cars)
b. time(cost)
c. number of cars(time)
d. cost(time)

I’m stuck on this i don’t understand.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Graph the linear function using the slooe and y intercept