For his phone service carlos pays a monthly fee of $19 and he pays an additional $0.07 per minute of use the lease has been charging a month is $97.75 what are the possible numbers of minutes he has used his phone in a month?

first you should try to find the closest multiple of 19 which you should multiply 19 by 5 and get 95. then subtract 97.75-95 which equals 2.75.  2.75 then needs to be divided by the cost per extra minute 0.07 so 2.75 divided by .07 which gets you 39. 39 minutes

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value