For every 3 packages that Marcella wraps, she uses 12 of a roll of wrapping paper. If she uses 2 1/2 rolls of wrapping paper, how many packages has she wrapped?

Ibelieve the second one, but if not, the first one will do. hope this : )

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.