Jerry runs up to a tank that holds up to 15 gallons of melted cheese When it is active it drains cheese onto crackers at a constant rate. When jerry first sees the tank, It contains 8 gallons of cheese. 5 minutes later it contains 5 gallons of cheese. At what rate in gallons per minute is the tank changing?

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.