Question

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 she uses the shower for 8 minutes each day?

14 gallons
48 gallons
69 gallons
96 gallons

Answer 1

Reyna will save 48 gallons each day

Answer 2

Answer: 48 gallons

Step-by-step explanation:

Given: Previous rate of dispensing water= 9 gallons per min

If Reyna use 8 min showerhead then

Total amount of water dispensed=$8\times9=72\ gallons$

After Reyna changed the showerhead to energy saving with equation

y=3x, where y is the amount of water dispensed as a function of the number of x minutes for the new showerhead.

When we put x=8 minutes, we get total amount of water dispensed=$3\times8=24\ gallons$

Water saved by Reyna=72-24=48 gallons