Use the information given to build a linear equation model, then use the equation to respo...

Use the information given to build a linear equation model, then use the equation to respond. Develop both an algebraic and a graphical solution.

Gas mileage: When empty, a large dump-truck gets about 15 mi per gallon. It is estimated that for each 3 tons of cargo it hauls, gas mileage decreases by mi per gallon.

a. If 10 tons of cargo is being carried, what is the truck’s mileage?

b. If the truck’s mileage is down to 10 mi per gallon, how much weight is it carrying?