Linear functions: given X2-X1=X4-x3 Prove f(x2)-f(x1)=f(x4)-f(x3)
proof: 1. x2-x1=x4-x3
proof 2. m(x2-x1)= (x4-x3)

Question 10jur's car can travel 340 miles on 12 gallons. jack's car can travel 390 miles on16 gallons. which person has the best mileage (miles per gallon) and what istheir mileage?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

What is the slope of the line shown below?