horizontal compression / stretch
Please explain the following.
The following function is given y=x^3+5x
Write the the equation to represent the following transformation:
1. horizontal stretch as a factor of 2. y=(1/2 x)^3 + 5(1/2 x) Is this correct?
2. horizontal compression as a factor of 2? I do not know. If a factor is greater than 1, isn't it always horizontal stretch. Shouldn't the factor be less than 1, in order for it to be a compression, like 1/2.
Please explain whether there is a mistake in the assignment, if there is no mistake, please explain how to write the equation.