What is the rule of the table? provide explanation plz

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

With both problems. a.s.a.p directions on photo ^

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.