For this case, the first thing we must do is define a variable.
We have then:
x: number of muffin plates
We now write the expression that models the problem.
We know there are 4 muffins in each dish, therefore, we have:

Substituting for x = 0 we have:
Answer:
There are 0 lemon muffins
d: 0
Answer:
7 books
Step-by-step explanation:
make an equation
x = # of books each book is $4 so its 4x
the shipping fee no matter how many books he buys will be $2 so it's just 2
the equation looks like this:
4x + 2 = 30
we set equal to 30 cuz he can't spend more than $30
solve for x
4x = 30 -2
4x = 28
x = 7
Brett can buy no more than 7 books.
2)Negative linear association because the line is straight and it’s going down meaning it’s negative