An optical prism is a transparent optical element with flat, polished surfaces that refract light. ... A dispersive prism can be used to break white light up into its constituent spectral colors (the colors of the rainbow).
Explanation: First to find the slope you need to find two points. I chose 1,4 and 2,7 . First you minus 7-4 (y) and then you minus 2-1 (x). Which would result in 3/1
