Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y.
A linear function describes a proportional relationship in with 1 input has only 1 output, however more than one input may have the same output. There may be many steps to find the outcome of an input
Adults pay = $33.60 Children pay = $16.80 (it's half price but if they take a round trip it's double the price. Therefore it's $16.80) then multiply both by two and add them together.
