## Calculus 8th Edition

(a) y = 3x is the green one. (b) y = $3^{x}$ is the blue one. (c) y = $x^{3}$ is the pink one. (d) y = $\sqrt[3] x$ is the black one.
y = 3x is a linear function. It must be a straight line. y = $3^{x}$ is an exponential function where the base 3 $\gt$ 1. y = $x^{3}$ is a power function. It's also odd, so it's positive if x $\gt$ 0 and negative if x $\lt$ 0. y = $\sqrt[3] x$ is a root function.