Question

Is the graphed function linear?

Yes, because each input value corresponds to exactly one output value.
Yes, because the outputs increase as the inputs increase.
No, because the graph is not continuous.
No, because the curve indicates that the rate of change is not constant.

Answer 1

It is the last one: No, because the curve indicates that the rate of change is not constant.

Explanation:

You can tell in the picture that if you connected the points it would not create a straight line.

Answer 2

The answer is D. No, because the curve indicates that the rate of change is not constant.

Explanation:

There is not a constant rate of change which results in a curved line.