Increasing and Decreasing Domain of a Parabola: With fractions

Find the intervals where the function is increasing and decreasing:

$y=-3\frac{1}{3}x^2-0.4$

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

Find the intervals where the function increases and decreases:
$y=\frac{7}{9}x^2+2$

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

Find the intervals where the function increases and decreases:
$y=\frac{1}{4}x^2+0.5$

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

Find the intervals where the function is increasing and decreasing:
$y=3x^2+16x$

$\searrow:x<-\frac{8}{3}\nearrow:x>-\frac{8}{3}$

Find the intervals where the function is increasing and decreasing:

$y=\frac{1}{5}x^2-4\frac{2}{9}x$

$\searrow:x<\frac{95}{9}\nearrow:x>\frac{95}{9}$

Find the intervals where the function is increasing and decreasing:

$y=-\frac{1}{6}x^2-\frac{5}{7}$

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

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 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 increases and decreases:

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

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

Find the intervals where the function is increasing and decreasing:

$y=-2x^2+10x$

$\searrow:x>2\frac{1}{2}\nearrow:x<2\frac{1}{2}$

Find the intervals where the function is increasing and decreasing:

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

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

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 increases and decreases:
$y=-\frac{1}{6}x^2+16\frac{2}{3}$

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

Find the intervals of increase and decrease of the function:
$y=-\frac{1}{2}x^2+2\frac{25}{72}$

$\searrow:x>0\nearrow:x<0$
$\nearrow:x < -2\frac{1}{6}$ or $x > 2\frac{1}{6}$

Find the intervals where the function is increasing and decreasing:

$y=\frac{1}{2}x^2-12\frac{1}{2}$

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

Find the intervals where the function increases and decreases:
$y=-\frac{1}{4}x^2+6\frac{1}{4}$

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

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

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

Find the intervals where the function increases and decreases:
$y=\frac{1}{4}x^2-9$

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