Pls me i need answers only to this page

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a