The price of stock A at 9am was $12.75. Since then, the price has been increasing at the rate of $0.07 each hour. At noon the price of Stock B was $13.25. It begins to decrease at the rate of $0.15 each hour. If the two rates continue, in how many hours will the prices of the two stocks be the same?

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.

20 percentage, you can also do it on a calculator.