Astandard showerhead in andrew's house dispenses 8 gallons of water per minute. andrew changed this showerhead to an energy-saving one. the equation shows the amount of water dispensed, y, as a function of the number of minutes, x, for the new showerhead.

y = 3x

how much water does andrew save each day with the change in showerheads if he uses the shower for 8 minutes each day?
a. 5 gallons b.16 gallons c.24 gallons d.40 gallons