
The vertex is at (0,-5), therefore the range goes from (-infinity, - 5]
Answer:
Blue
Step-by-step explanation:
Blue = 43.5/1.25
34.8 mpg
Red = 21 3/5 / 4/5 = 21.6/0.8
27 mpg
If it's a regular octahedron, then you can calculate it using the formula

where

is the length of the edge.
If it's not regular, you have to calculate the area of each side individually.
You put the values of x into the equation to work out y, so the y column would be -5, -1, 3, 7 (for question 6)
For question 7, the y column would be 2,2,0,-2
Use these values to draw the graphs :)