Jasper has invested an amount of money into a savings account. The graph below shows the value of his investment over a period of time. [br][br]What is the rate of change for the interval [1, 3]?

[list=1][br][*]Determine the interval to be observed.[br][*]Identify the starting point of the interval.[br][*]Identify the ending point of the interval.[br][*]Substitute the starting point and ending point into the slope formula to calculate the rate of change.[br][/list]