Question

To graph y = -cosx, _____.

shift y = cosx left 1 on the x-axis
shift y = cosx up 1 on the y-axis
reflect y = cosx over the x-axis
reflect y = cosx over the y-axis

Answer 1

reflect y = cos x over the x-axis

Explanation:

When a function is reflected over the x-axis, the transformation is:

y = -f(x)

If it were reflected over the y-axis, the transformation would be:

y = f(-x)