Intervals of Increase and Decrease Quadratic

Where is the polynomial function decreasing?

• ( −∞, −2.55) U (0, 2.55)

• (∞, −6.25) U (36, −6.25)

• ( −∞, −2.55] U [0, 2.55]

• (−∞, 0)

Is interval 2 increasing, decreasing, or constant?

• Increasing

• Decreasing

• Constant

Is interval 4 increasing, decreasing, or constant?

• Increasing

• Decreasing

• Constant

What is/are the decreasing interval(s) for the function shown?

Does this function have an absolute maximum?

• Yes 

• No

Is interval 3 increasing, decreasing, or constant?

• Increasing

• Decreasing

• Constant

Find the intervals of increase and decrease of f(x) = 6x² + x - 2

• interval of decrease: (infinity , -1/12) , interval of increase: (-1/12 , +infinity)

• interval of decrease: (-infinity , -1/12) , interval of increase: (-1/12 , +infinity)

• interval of decrease: (-infinity , -1/12) , interval of increase: (1/12 , +infinity)

• interval of decrease: (infinity , -1/12) , interval of increase: (-1/12 , infinity)

Find the intervals of increase and decrease of f(x) = -0.5x² + 1.1x - 2.3

• f increases over the interval (-infinity , 1.1) and decreases over the interval (1.1 , + infinity)

• f increases over the interval (-infinity , -1.1) and decreases over the interval (1.1 , + infinity)

• f increases over the interval (infinity , 1.1) and decreases over the interval (1.1 , - infinity)

• f increases over the interval (-infinity , -1.1) and decreases over the interval (-1.1 , + infinity)

Find the maximum or minimum value of f(x) = 2x² + 3x - 5

• a) f has a minimum value equal to 4

• b) f has a minimum value equal to -9/4

• c) f has a minimum value equal to -49/8

• d) f has a minimum value equal to 49/8