B has two pre-images of -7 so it is not a function
Multiply the number of days by the amount of time you save each week.
It is in standard form: y=mx+b
Answer:

Given:
5 pounds rice cost $2.49
To Find:
Cost of 9 pounds rice
Step-by-step explanation:
5 pounds rice cost $2.49
1 pound rice will cost $ 
So,
9 pounds rice cost = 1 pound rice cost × 9
= $
= $0.498 × 9
= $4.482
-5x≤40 would be the answer