The Equation $y=x^{2}$ Is Satisfied by the Points $(2,4)$ And $(-2,4)$ a Horizontal Line May Be Drawn Between These Two

Essay

The equation $y=x^{2}$ is satisfied by the points $(2,4)$ and $(-2,4)$ . A horizontal line may be drawn between these two points. Is $\mathrm{y}=\mathrm{x}^{2}$ a function? Explain.