Concept of FUNCTION (with atleast two examples) in every day life
Not sure about the calculus part, but these are examples of function from everyday life.
1) Total amount one should pay for a meal costing x dollars on the menu, when there is 9% sales tax that must be added, and a 15% tip should be added on top of that subtotal.
f(x) = 1.09x /menu price + 9% tax
g(x) = 1.15x /15% tip
h(x) = f(g(x)) /the two combined
2. Distance traveled, in feet, in a car going 60 mph (1 mile per minute), for t minutes.
f(t) = t(5280)