Question

How do you write a direct variation equation if y varies directly with x and y = 10 when x = 2?

Answer 1

`y=5x`

Explanation:

`"the initial statement is "ypropx`

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

`y=kx`

`"to find k use the given condition"`

`y=10" when "x=2`

`y=kxrArrk=y/x=10/2=5`

`"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=5x)color(white)(2/2)|)))`