Answer:
25
Step-by-step explanation:
First, lets create a equation for our situation. Let x be the months. We know four our problem that Eliza started her savings account with $100, and each month she deposits $25 into her account. We can use that information to create a model as follows:
25x+100
We want to find the average value of that function from the 2nd month to the 10th month, so its average value in the interval [2,10].
We can conclude that the average rate of change in Eliza's account from the 2nd month to the 10th month is $25.
The work is below in a png.
