The equation of the graph is the form y = a sin x. What is the amplitude of the sine curve?

Question

What is the value of a?

amplitude = 3; a = -3

amplitude = -2; a = -2

amplitude = 3; a = 3

amplitude = 2; a = 2

Answer 1

The amplitude of the sine curve is the absolute value of the coefficient a. Therefore, the correct answer is:

amplitude = 3; a = 3

Answer 2

any one of those except B could be correct, depending on the expression.
the amplitude is always positive; a not necessarily

Answer 3

Thank you for the correction. You are correct. The amplitude is always positive, so the correct answer is:

amplitude = 3; a = -3