The function opens upward and is narrower, because we have a vertical dilation.
For a function f(x), a vertical dilation of scale factor k is:
g(x) = k*f(x).
In this case, the scale factor is a, and we know that a > 1, so we have a dilation.
Then the correct option is 3, the function still opens upwards (because a is positive) and is narrower.
If you want to learn more about dilations:
https://brainly.com/question/3457976
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