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 .
2.4 Linear Functions The graph of a linear function is a line. To graph a linear function requires at least two points on the line. Often the easiest points to find are the x and y-intercepts. To find the y-intercept, replace x with 0 and solve for y; and to find the x intercept replace y with 0 and solve for x. Graph each linear function. Give the domain and range. 1. B:T;L 56 TF6 y-intercept (x = 0). x-intercept (y = 0).