Leona spent 5/8 of 2/3 of her allowance on magazines. What fraction of her total allowance did she spend on magazines?
What fraction did she have left?

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.