Question

Why is y=2x considered a function?

Answer 1

Answer:

If you can move a vertical line along the x-axis and only intersect one y at a time, your equation is a function as it follows the only one output for each input rule. Solve your equation for y. For instance, if your equation is y -6 = 2x, add 6 to both sides to get y = 2x + 6. Decide on a name for your function.