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#
