Question

Which relation is NOT a function a: y=5x b: y=x2 c: x=3 d: y= 6x

Answer 1

x = 3

Explanation:

Think about an archery practice. One target can get hit by multiple archers, but an archer can only shoot one arrow. Therefore its x = 3, because the same x value can not hit every y. Hope this helps, its for more visual learners.

Archers (x) Targets (y)

X O

X O

X O

X O

Answer 2

C. x = 3

Explanation:

because it is not a function, it's an answer. The other equations are all equal to y, which you can find the x and the y for a coordinate, but for c you have just x, and without y you can't have a function.