Write an equation that models the linear situation:12 gallons are drained from a pool every minute. The pool began with 15,000 gallons in it.Instructions:DO NOT USE ANY SPACES between variables, constants, equals signs, and operation signs.For example, DO NOT enter f(x) = 2x + 1DO ENTER: f(x)=2x+1Put parentheses around constants that are fractions like this: y=(2/3)x-(1/2)You may use decimals IF the decimal values are exact. (You cannot use .33 for 1/3 because it is not exact, but you can use 0.25 for1/4.)To write your equation, use the variables:t = amount of time pool has been draining (minutes)W(t)= amount of water drained from the pool (gallons)