Question

Which is the best description for the graph?

A.The graph is increasing everywhere.B.The graph is decreasing everywhere.C.The graph is increasing, then decreasing. D.The graph is decreasing, then increasing

Answer 1

D.The graph is decreasing, then increasing

Answer 2

D.The graph is decreasing, then increasing

Explanation:

The last choice is the best statement.

1. When a function decreases is because while x-values are increasing, y-values are decreasing.
2. When a function increases is because while x-values are increasing, y-values are increasing.

If we have present these two rules, we could observe that the first have of the parabola is decreasing, because it follows first rule, y-values are decreasing.

Then, the second half of the parabola is increasing, because it simulates the second rule, y-values are increasing while x-values are also increasing.

So, basically, the function decreases and then increases.

Therefore, the right answer is D.