•the equation can be written in function notation as . the f(x) replaces y. in other words, f(x) and y represent the thing. they are both the variable. f(x) and y depend on x. • if you say (pronounced "f of 2"), that means you plug in 2 for x.

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?