It totally depends on the value of a , that it will stretch or compress.
A function change that makes a graph bigger or narrower is called a stretch or compression. To stretch a graph is to enlarge or reduce its size. Transformations are used to change the graph of a parent function into the graph of a more complex function.
1. Determine a's value.
2. Multiply each value in the range by a.
3. The graph is distorted by an amount equal to aa if a>1.
4.The graph is compressed by a factor of aa if 0<a<1.
5.If a<0, the graph is distorted around the x-axis and either stretched or compressed.
Learn more about the stretch or compression at:
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