Haj mixes gallon of water with every 1 cup of a laundry powder. how many gallons of water does he mix with 7 cups of laundry powder?

between 3 and 4 gallons
between 4 and 5 gallons
between 5 and 6 gallons
between 6 and 7 gallons

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.