The demarco family filled the gas tank on the highway at 8 am at 1pm they stopped for gas and spent 43.75 to fill the gas tank with 12.5 gallons they had traveled 300 miles between 8am and 1pm

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.