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 .
Definition of Linear Function. A function that can be graphically represented in the Cartesian coordinate plane by a straight line is called a Linear Function.A linear function is a first degree polynomial of the form, F(x) = m x + c, where m and c are constants and x is a real variable.The constant m is called slope and c is called y-intercept. Step 1: The graph of a linear function is a straight line. 2  Step 2: Graph 4 is a straight line. 3  Step 3: So, Graph 4 represents a linear function.