Increasing and Decreasing Domain of a Parabola: Representation of value a only

Find the domain of decrease of the function: $y=10x^2$

x < 0

Find the domain of increase of the function:

$y=2x^2$

x > 0

Find the domain of decrease of the function: $y=2x^2$

x < 0

Find the domain of increase of the function:

$y=x^2$

x > 0

Find the domain of decrease of the function: $y=x^2$

x < 0

Find the domain of decrease of the function: $y=-9x^2$

x > 0

Find the domain where the function is increasing:

$y=-4x^2$

x < 0

Find the domain of decrease of the function: $y=-4x^2$

x > 0

Find the domain of increase of the function:

$y=-x^2$

x < 0

Find the domain of decrease of the function: $y=-x^2$

x > 0

Find the domain of increase of the function:

$y=10x^2$

x > 0

Find the intervals of increase and decrease of the function:
$y=-\frac{1}{4}x^2$

\searrow~:x>0~~|~\nearrow~:x<0

Find the intervals where the function is increasing and decreasing:

$$$y=5\frac{1}{3}x^2$

\searrow~:x<0~~|~\nearrow~:x>0

Find the intervals where the function increases and decreases:

$$$y=\frac{1}{2}x^2$

\searrow:x<0|\nearrow:x>0

Find the intervals where the function is increasing and decreasing:
$y=-6\frac{1}{5}x^2$

\searrow:x>0\nearrow:x<0