Answer:
Proportional
Step-by-step explanation: Its proportional because it is a straight line, and the line starts at 0, which is the point of origin.
Answer: I am the saving grace
Step-by-step explanation:
In the attachments :)
Answer:
x = 10
y = 20
Step-by-step explanation:

Answer:
$3 for 1 book.
Step-by-step explanation: