Astandard shower head in marty's house dispenses 7 gallons of water per minute. marty changed this shower head 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 shower head.

y = 3x

how much water does marty save each day with the change in shower heads if he uses the shower for 8 minutes each day?

a. 4 gallons
b . 12 gallons
c . 32 gallons
d . 53 gallons