The independent variable, x, represents the number of cups of coffee purchased, and the dependent variable is the total monthly cost, because the total monthly cost depends on the number of cups of coffee purchased.
A function relating these variables is A(x) = 20 + 2.5x.
So A(7) = 20 + 2.5(7) = 20 + 17.5 = 37.5.
Therefore, A(7) equals 37.5.
Zahra has joined the Frequent Coffee Buyer program with a local cafe. The program costs $20 per month which allows her to get a discounted coffee price of $2.5 per cup. Answer the questions below regarding the relationship between the of number of cups of coffee purchased and the total monthly cost.
Answer
Attempt 1 out of 2
The independent variable, x, represents the
, and the dependent variable is the
, because the
depends on the
.
A function relating these variables is A, left bracket, x, right bracket, equalsA(x)=
.
So A, left bracket, 7, right bracket, equalsA(7)=
, meaning 77
.
1 answer