Write down the variation function and sketch its graph.

$y$ varies directly as $x$, and when $y=30, x=5$.

Write down the variation function and sketch its graph.

$y$ varies inversely as $x$, and when $y=2,x=6$.

Write down the variation function and sketch its graph.

$y$ varies directly as the square of $x$, and when $x=4, y=120$.

Write down the variation function and sketch its graph.

$y$ varies inversely as the square of $x$, and when $x=4, y=5$.

Write down the variation function and sketch its graph.

$y$ varies directly as the cube of $x$, and when $x=2, y=62.5$.

Write down the variation function and sketch its graph.

$y$ varies inversely as the cube of $x$, and when $x=\frac{1}{2},y=4$.

Determine whether the following graph show a direct variation function, an inverse variation function, or neither. Justify your answer.

Determine whether the following graph show a direct variation function, an inverse variation function, or neither. Justify your answer.

Determine whether the following graph show a direct variation function, an inverse variation function, or neither. Justify your answer.