Question

Which is NOT a function?
x+3=y²
y=x²-3
x+y = 3²
y=x+3²

Answer 1

x + 3 = y^2

Explanation:

x + 3 = y^2 is not a fnction

The graph of this is a parabola which opens to the rigth so it fails the vertical line test. ( a vertical line can be drawn to pass throgh 2 points on the graph)

Answer 2

Hello!

x + 3 = y² ☑

y = x² - 3 ☑

x + y = 3²

y = x + 3² ☑