1. The distance that Giselle can run is a function of the amount of the time she speeds running. Giselle runs 3 miles in 21 minutes. Assume she runs at a constant rate. a. Write an equation in two variables that represents her distance run, y, as a function of the time, x, she spends running

b. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 14 minutes.

c. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 28 minutes.

d. Use the equation you wrote in part (a) to determine how many miles Giselle can run in 7 minutes ​