The variables x=-0.3 and y=2.2 varies directly. How do you write an equation that relates the variables and find x when y=-5?
1 Answer
Sep 13, 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=-0.3" and "y=2.2#
#y=kxrArrk=y/x=(2.2xx10)/(-0.3xx10)=-22/3#
#"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=-(22x)/3)color(white)(2/2)|)))#
#"when "y=-5#
#x=-(3y)/22=-(3xx-5)/22=15/22#
