Question

How to write an algebraic rule and a function rule

Answer 1

Hello! Let's analyze the question:

Every time, the dishwasher uses 20 gallons of water.

x = number of times that the dishwasher is run

y = number of gallons of water used

Knowing that we can write the function as:

`f(x)=20.x`

To find how many gallons of water were used, you just need to know the number of times that the dishwasher is run (because every 1 time spends 20 gallons).

Another way to write it is:

y = 20x