(7,0) (4,2) (3.5) (-1,5) Is this a function? *

The answer is yes it is a function  because the x (domain) is not repeating :)

Step-by-step explanation:

Also when the x(domain) is repeating it is not a fuction  if the x is not repeating it is a function * DON't worry about the y (Range) don't focus on it only focus on the X (domain)

answer: 60

step-by-step explanation:

1/2a + (2/3×30)   = 50

1/2a + 20 = 50

1/2a = 30

a = 60