The graph represents the data cost for monthly internet
service for a cell phone.
which function, c(x), represents the monthly cost in
dollars in terms of x, the number of gigabytes used in a
month?
cell phone internet service

Aand b is what i think

1. use commutative property to reorder the terms.2x+81=0.2. move the constant to right side by adding its opposite on both sides. 2x+81-81=0-81.2x=(-81).3. divide the equation on both sides.2x ÷ 2 = 81 ÷ 2.x = -81/2. your answer is -81/2. if you need to simplify it into a decimal, it’s -40.5.

Dhope this