Jacob is buying new tires for his car. They normally are $170 each, and he needs to replace all 4. Which option saves him the most money?

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.