Direct Proportion

What is the constant of proportionality for the following graph?

Find the constant of proportionality, if $y=30\text{ and }x=6\text{ and }y\propto x$.

Find the constant of proportionality, if $y=24\text{ and }x=5\text{ and }y\propto x$.

What is the constant of proportionality?

Find the constant of proportionality, if $y=8\text{ and }x=3\text{ and }y\propto x$.

Let us assume that $y$ varies directly with $x$, and $y=20$ when $x=4$. Use the constant of proportionality and find the value of $y$ when $x=100$.

$4$ workers take $2$ hours to finish the desired work. If $2$ more workers are hired, in how much time will they complete the work?

Suppose $x$ and $y$ are in an inverse proportion such that, when $x=12$, then $y=8$. Find the value of y when $x=12$.

Let us assume that $y$ varies directly with $x$, and $y=30$ when $x=6$. Use the constant of proportionality and find the value of $y$ when $x=100$.

$4$ workers take $3$ hours to finish the desired work. If $2$ more workers are hired, in how much time will they complete the work?

What is directly proportional?

Suppose $x$ and $y$ are in an inverse proportion such that, when $x=15$, then $y=8$. Find the value of y when $x=20$.

Is the graph proportional or non proportional?

Is the graph proportional or non proportional?

What is the constant of proportionality?

What is the constant of proportionality for the following graph?

What makes a graph proportional?

A proportional relationship is represented by the equation $y=4x$. Use the equation to fill in the table.  

The relationship between $x$ and $y$ are proportional. When $x$ is $10$, $y$ is $100$. The equation for this relationship is

 The equation y = 5x + 2 is not a proportional relationship because