# Graph y = a cos(x) + d (Quiz)

- Author:
- Tim Brzezinski

- Topic:
- Cosine, Function Graph

**Directions:**1) Note the cosine function displayed in green in the upper right hand corner of the applet. 2) Move each of the 5 red points up and/or down so that the red wave that passes through these 5 points is the EXACT GRAPH of the purple equation displayed. (There may be times when the red graph will disappear--and that's okay. It'll reappear as you continue to move these points.) 3) Once you graph the displayed function correctly, the entire graph will turn purple and a

**"NICE JOB !!!"**box will appear. 4) Click on the

**"Generate New Function to Graph"**to display a new equation. 5) Repeat steps (1) - (3). Then repeat step (4).

**6) Complete this activity as many times as you need in order to master this concept!**

****For extra practice with graphing functions of the form "y = a sin(x) + d", go to http://tube.geogebra.org/m/1754071.**