Bookworm bookstore offers books for $14. Or you could join their Star Readers club which is $80 to join and then only $8 a book.

Bookworm:

y = 14x

Star Readers:

y = 80 + 8x

IF you want to see when you pay the same amount, then we set up a system of equations:

14x = 80 + 8x

6x = 80

x = 40/3, so when you buy 13 or less books is the Bookworm bookstore better. Star Readers is better when you have 14 or more books.

yes. we do proportions in probabilities.

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)