One year after sarah started a new job, she had $1200 in her savings account. each year, she added $900 more to the savings account. what function, written in sequence notation, models sarah’s savings account balance n years after starting her new job? an=300n+1200 an=900n+300 an=300n+900 an=900n+1200

an=900n+300

just took the test

c

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,