A point is actually a zero dimensional geometric object. The reason behind selecting this answer is that a point does not have a length, width or height. The correct option among all the options that are given in the question is the second option or option "B". I hope the answer comes to your help. <span />
One simple approach would be to choose an x value, such as x = 8, calculate y using the given formula, and then choosing the graph that shows a C(t) value closer to your calculated value.
