Use the graph to determine

a. open intervals on which the function isincreasing, if any.

b. open intervals on which the function isdecreasing, if any.

c. open intervals on which the function isconstant, if any.

-5

-4

-3

-2

-1

1

2

3

4

5

-5

-4

-3

-2

-1

1

2

3

4

5

x

y

A coordinate system has a horizontal x-axis labeled from negative 5 to 5 in increments of 1 and a vertical y-axis labeled from negative 5 to 5 in increments 1. A parabola that opens downward has vertex (0, 1) and passes through the approximate points (negative 1, 0.8) and (1, 0.8).

a. Select the correct choice belowand, ifnecessary, fill in the answer box to complete your choice.

A.

The function is increasing on theinterval(s)

nothing

.

(Type your answer in interval notation. Use a comma to separate answers asneeded.)

B.

There is no interval on which the function is increasing.