The variables x=-5 and y=-1 varies directly. How do you write an equation that relates the variables and find x when y=-5?
1 Answer
Nov 6, 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"
x=-5" and "y=-1
y=kxrArrk=y/x=(-1)/(-5)=1/5
"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=1/5x)color(white)(2/2)|)))
"when "y=-5
-5=1/5xlarrcolor(blue)"multiply both sides by 5"
rArrx=-25
