need help with precalculus

Question

Determine the intervals on which the function is increasing, decreasing, and constant.

is it Increasing x > 0; Decreasing x < 0 ??

Use the graph of f to estimate the local maximum and local minimum.

is it Local maximum: (0,0); local minimum: (-2,-4) ?

Answer 1

the 1st graph, the parabola, is increasing when x>0, decreasing when x<0 and constant only at the point where x=0

the 2nd graph is decreasing for x<-2, also when 0<x<2

increasing when -2<x<0 and also when x>2

it's constant when x=-2, 0 or 2

local maximum is the origin (0,0)

local minimums are (-2,-4) and (2,-4)

local extremum is a point which divides the intervals where the graph is increasing and decreasing