How do you find an equation of variation where y varies directly as x and y = 10 when x = 5, find y when x is 4?
1 Answer
Jun 11, 2017
Explanation:
"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 for x and y"
y=10" when " x=5
y=kxrArrk=y/x=10/5=2
"the equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=2x)color(white)(2/2)|)))
x=4toy=2xx4=8
