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 .
Determine the value of the slope of a line from a table or a graph. Proportional Relationships. Determine whether a linear function is a direct variation. Solve problems involving direct variation. Compare proportional and non-proportional linear functions in the form of a table, graph and equation. Slope Intercept Form. Analyze a graph to determine slope and y-intercept. Graph a linear function using the slope and y-intercept. Write a linear equation in slope-intercept form given the slope and y-intercept. Standard Form. Analyze a linear graph to determine the intercepts. Write linear equations in standard form to model real world scenarios. Determine and interpret the intercepts of a linear function from an equation in standard form.