To be a function each different x value would have a different Y value.
First one is a function, there are no repeated Y values.
The second one is a function.
Third one is not a function because it has two identical Y values with different x values.
The fourth one is a function.
The answer is B The overall price change for the week
i hope it help
Answer:
The answer is "789.03 and 806.16".
Step-by-step explanation:
For point a:
Calculating the value for 
For point b:
Calculating the value of 
x = 50
The angles shown are vertically opposite and thus equal
so 3x - 30 = 2(x + 10)
3x - 30 = 2x +20
subtract 2x from both sides
3x - 2x - 30 = 20
x - 30 = 20
add 30 to both sides
x = 20 + 30 = 50
The answer is right because 12^2 + 35^2 = 1369 and 37^2 = 1369 1369=1369 so it is a right triangle
