The students are asked some questions. The teacher should explain the reflection of a function to the y-axis. The students will be able to examine each case with Algebra Xpressor. The next is an example. The purpose of this question is to see whether the students can understand the translation of the graph.
Students try to sketch the graph on a paper.
Then they will check the result. Following is an example. The students are asked to think about the absolute value first, then they draw the graph and see that what kinds of graphs can make it. Now, the students obtain a graph which may look like a quadratic function. But it is understood that the graph is not a quadratic function, but a combination of two exponential functions.