Question

Which graph or graphs appear to show a sinusoid ?

Answer 1

Answer:

Option: D is the correct answer.

             D.   I and III only

Step-by-step 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.

Answer 2

Answer:

D

Step-by-step 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.