12-13= yx this is that expression
You can use photo math but the first one is b
Answer:
$3/book
Step-by-step explanation:
cost per book means divide the price of all the books by the number of books
$15/(5 books) = $3/book
Step-by-step explanation:
a. (1,1) and (7,5)
b. (1,1) and (5,7)
c. (2,5) and (-1, 2)
d. (2,5) and (-7,-4)
Slope of the line that passes through the points
The slope = 
a. (1,1) and (7,5)
;
slope =
= 
slope = 
b. (1,1) and (5,7)
slope =
= 
slope =
c. (2,5) and (-1, 2)
slope =
= 
slope = 1
d. (2,5) and (-7,-4)
slope =
slope =
= 1