The cost of dollars, y, of x books at a book sale is represented by the equation y=4x. Which statement is not true?
A. the total cost is directly proportional to the number of the books purchased
B. The constant of proportionality represents the cost of one book.
C. The cost of 4 books is $16
D. The number of books purchased is 4 times the total cost

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant

the answer is b.

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2