F FMMurphy Junior Member Joined Mar 12, 2006 Messages 51 Sep 28, 2006 #1 I have variables x and y that vary directly and y = -7 when x =14. I am to write an equation that relates the variables. I have done -7=14k -7/14 =k then y =- 1/2 ???

I have variables x and y that vary directly and y = -7 when x =14. I am to write an equation that relates the variables. I have done -7=14k -7/14 =k then y =- 1/2 ???

skeeter Senior Member Joined Dec 15, 2005 Messages 2,396 Sep 28, 2006 #2 no ... k = -1/2 y = kx y = (-1/2)x