The ordered pairs (-1,2) and (4,y) are for the same direct variation, how do you find each missing value?
1 Answer
May 6, 2018
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"#
#(-1,2)tox=-1,y=2#
#y=kxrArrk=y/x=2/(-1)=-2#
#"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=-2x)color(white)(2/2)|)))#
#"when "x=4" then"#
#y=-2xx-4=-8#
#rArr(4,y)to(4,-8)#