Maricella is playing with a Slinky in physics class. Her friend Jorge holds one end of the Slinky while Maricella moves her end back and forth from left to right. What type of wave are Maricella and Jorge demonstrating?

A Transverse wave.

explanation

A transverse wave moves back and forth at right angles to the way the wave is moving. An ocean wave moves up and down at a right angle to the direction the wave is moving (toward the beach).