A cell phone charges $50 for the phone plus a monthly service charge of $30. What would be the total cost after 3 months?

$140

Step-by-step explanation:

Phone cost: $50

1 Month of service charge: $30

3 Months of service charge: $90

Total cost: $30 + $90 = $140

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

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.