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 .
Chapter 4 Linear and Quadratic Functions Section summaries 2 +k ;where (h;k) is the vertex of the graph (which is a parabola). You can see from the formulathat h gives the left/right shift while k gives the up/down shift. The coecient a representsa vertical stretch or compression.