It's not a function because 4 and 1 has 2 images in y so there's no range but the domain = {4,1,0}
Answer:
up and down is positive, side by side is negitive diagnoal lines are negitive. so undefined is anything under the x axis that doesn't go over the line
Answer:
Step-by-step explanation:
Associative property
The constant of proportionality is 5
For the first bar day: 1 cell phone sold: 5 (unit rate:5)
second bar day: 2 cell phones sold: 10 (unit rate:5)
third bar Day: 3 cell phones sold: 15 (unit rate: 5)
fourth bar day: 4 cell phones sold: 20 (unit rate 5)
Basically you divide the cell phones sold by the day or 
Hope this helped <3