Find the value of k that makes the slope between the points (k,3) and (1,-4) equal to 0.75

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

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Ineed no it anyone can see this