Find the length of AB

Jim makes $10.35 per hour. write an equation that jim can use to calculate his pay.

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3