Question

Which graph or graphs appear to show a sinusoid ?

Answer 1

D

Explanation:

Sinusoid graphs look like regular waves.

It is obvious that only I and III look like waves.

II is known as a stepwise function.

Answer 2

Option: D is the correct answer.

D. I and III only

Explanation:

• The graph of a sinusoidal function is a smooth periodic graph.

• The graph is continuous all over the x-axis and also it repeats itself after every fixed interval.

From the graph that is provided to us we observe that the graph I is a sinusoidal graph since it is similar to a graph of sine graph.

Also, the graph II is not a continuous graph and hence it can't be a graph of sinusoidal graph.

Also, graph III is similar to a graph of sine function and hence it represent a graph of a sinusoidal graph.