Answer:
Changing value of "a" changes the amplitude of the sine graph.
Step-by-step explanation:
Question says to find about how does the a value affect your sine graph.
General equation of sine function can be given as:
[tex]y=a\cdot\sin\left(b\left(x-h\right)\right)+k[/tex]
There value of "a" gives amplitude.
So changing value of "a" changes the amplitude of the sine graph.