2. Then add heat. After 24 hours, use heat to dilate the blood vessels and improve circulation in the area. Warm compresses will help speed up the bodys natural mechanisms for removing the blood in the bruise, says Randy Wexler, M.D.
where k is the constant of variation. Since k is constant (the same for every point), we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example, if y varies directly as x , and y = 6 when x = 2 , the constant of variation is k = = 3 . Thus, the equation describing this direct variation is y = 3x .
Direct variation problems are solved using the equation y = kx. In this case, you should use p and q instead of x and y and notice how the word âsquareâ changes the equation. Step 2: Use the information given in the problem to find the value of k. In this case, you need to find k when p = 20 and q = 5.