I have one more question on my lesson plan, I thought the answer was D.
A standard showerhead in Reyna's house dispenses 9 gallons of water per minute. Reyna 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 Reyna save each day with the change in showerheads if he uses the shower for 8 minutes each day?

14 gallons

48 gallons

69 gallons

96 gallons

Question

I have one more question on my lesson plan, I thought the answer was D. 
A standard showerhead in Reyna's house dispenses 9 gallons of water per minute. Reyna 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 Reyna save each day with the change in showerheads if he uses the shower for 8 minutes each day?

14 gallons

48 gallons

69 gallons

96 gallons

RawlsK29 · Answer

@Ultrilliam @563blackghost @Bearclaws72

Vocaloid · Answer

amount dispensed = amount dispensed per minute * number of minutes

translating this to an equation we get

y = 9x for the old faucet
y = 3x for the new faucet

for x = 8, calculate the difference between the two y values

RawlsK29 · Answer

Yeah, i just figured it out. I got B (48) as my answer. I was just making dumb mistakes. Thanks for helping though.(: