No it is not a function because the 2 repeats and for it to be a function none of the x values can repeat.
The domains are -8, 0, 2, 2, 7 (when it asks for domain it is asking for the x values)
The ranges are 7, 1, -6, 3, 9 (when it asks for range it is asking for the y values)
Answer:
$19.50
Step-by-step explanation:
First, we find the number of gallons in 100 cups.
1 gallon = 16 cups
100 cups * (1 gallon)/(16 cups) = 6.25 gallons
100 cups is the same as 6.25 gallons.
Now we multiply the number of gallons by the cost per gallon.
6.25 gallons * 3.12 $/gallon = $19.50
The slope is -2/3 or -2 over 3
Okay, it's the equation to how find area any other way. A=L×W
This means *picture above*
So then you count over each line meaning 1.
This means L=9 and a 1/2. Since its in between the 2 an 3 on the x-axis.
Now for W or width. It equals 3 since you can count 2 lines and one either ends of the polygon is 1/2 each this creates one when added together.
All you do from there is multiply 9 and 3. This should give you A=area.
Hey there!
The answer to your question is 
Write the equation
Distribute -2
Combine like terms
Add 10 to both sides
Divide both sides by -11
Hope it helps and have a great day!