Function or Not 
No, -7 gives two different outputs
What is the y-intercept of the function:
y = 2/3x - 10
-10
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
Yes, because it does not repeat
Function on not?
X is not repeating, automatically YES
What is the slope of the function?
y = 3x - 10
3

No, it doesn't pass the vertical line test.
Function or not?

Yes, different inputs can have the same output (Costco water vending machine)
What is the y-intercept of the function?
y = 9x + 4/5
4/5
Is it a function?
{(2, 1), (3, 1), (4,1), (-1,1)}
Yes, the x-values are assigned one y-value
Function or Not?
Yes, x is NOT repeating.
What is the slope of the function?
y = -5/3x + 10
-5/3
Function or Not

No, it does not pass the Vertical line test
x y
2 4
-3 4
7 7
X is not repeating, automatically YES!
Challenge: Rearrange the equation to be in the format y=mx+b to find the slope of the function..
2x + y = 10
-2
Do these ordered pairs represent a function?
{ (2,2) , (3,3) , (4,4) , (2,2) , (5,5) , (6,6) }
Yes, each input has exactly one output.