SOLUTION: please show me how to do this problem! If y varies directly with x, and y = 10 when x = 15, find y when x = 6.

Question 92191This question is from textbook
: please show me how to do this problem! If y varies directly with x, and y = 10 when x = 15, find y when x = 6. This question is from textbook

Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
if y varies directly with x, then they are on opposite sides of an equation with a constant of variation (fudge factor)

use the given values to find the constant, then use the constant to find other values

y=kx ... 10=k(15) ... 10/15=k ... k=2/3 ... y=(2/3)(6) ... y=4
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