3.4 Direct Variation

Does this equation show direct variation?

y = 14x

Does this equation show direct variation?

y + 3 = 14x

Does the following equation represent direct variation

$$3y=x$$  

If so, what is the constant of variation?

Does the following equation represent direct variation?

$$x+2y=0$$  

If yes, what is the constant of variation?

Does the following equation represent direct variation?

$$3x-3y+6=6$$   

If yes, what is the constant of variation?

Does the following equation represent direct variation?

$$-5y=20x$$  

If yes, what is the constant of variation?

The variables y and x vary directly. $$y=\ 10\ when\ x\ =\ 5$$  

What is the direct variation equation that relates x & y

The variables y and x vary directly. $$y=\ 10\ when\ x\ =\ 5$$  

What is the value of y when x=-2

The variables y and x vary directly. $$P=\ -14\ when\ L\ =\ 7$$  

What is the direct variation equation that relates x & y

The variables y and x vary directly. $$P=\ -14\ when\ L\ =\ 7$$  

Find the value of L when P = 6