Aused-book store sells paperback books for $1.30 with a $0.25 discount for each book more than 5 that a customer buys. a customer bought some books last week for $13.85. the store has a sale this week. the price for each book is $1.15, with the same discount on each book over 5 purchased. how much would the customer save if the same books were bought this week?

The customer originally bought 12 books. If this customer still purchases this number:
1.15 x 5 = 5.75
0.90 x 7 = 6.30
5.75 + 6.30 = $12.05
$13.85 - $12.05 = Customer would have saved $1.80.
Hope this helps! ~ArchimedesEleven

The graph in the attached figure

Step-by-step explanation:

we have

 

This is the equation of the line into point slope form

The point is (1,-2) and the slope  is m=1/5

we know that

To correctly identify the graph find out the x and y intercepts of the graph

Find the y-intercept

The y-intercept is the value of y when the value of x is equal to zero

For x=0

The y-intercept is the point (0,-2.2)

Find the x-intercept

The x-intercept is the value of x when the value of y is equal to zero

For y=0

The x-intercept is the point (11,0)

To graph the line plot the intercepts and join the points

see the attached figure