Question

Time scaling is an operation performed on _______

(a) Dependent variable

(b) Independent variable

(c) Both dependent and independent variable

(d) Neither dependent nor independent variable

The question was asked in an interview for job.

This key question is from Basic Operations on Signals in chapter Signals and Systems Basics of Signals and Systems

Answer 1

Right option is (b) Independent variable

To explain I would say: Time scaling is an example for operations performed on independent variable time.

It is given by y (t) = x (at).