Question

Find the opening interval where the following function is increasing decreasing or constant express your answer in interval notation

Answer 1

decreasing : (-∞, 2]

increasing : [2, ∞)

EXPLANATION :

The function is decreasing if the graph is going down, and it is increasing if it is going up.

From the negative infinity to 2, the graph is decreasing so this will be (-∞, 2]

From 2 to positive infinity, the graph is increasing so this will be [2, ∞)