Home > Algebra > Direct Variation

Given that y varies directly with x, and x = 5, y = -30, how do you write a direct variation equation that relates x and y?

Answer 1

Julia Adams

#y=-6x#

#"the initial statement is " ypropx#

#"to convert to an equation multiply by k the constant "# #"of variation"#

#rArry=kx#

#"to find k use the given condition"#

#x=5,y=-30#

#y=kxrArrk=y/x=(-30)/5=-6#

#"the equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=-6x)color(white)(2/2)|)))#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Savannah Anderson

The direct variation equation that relates x and y is y = -6x.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.