3.1: The Definite IntegralSection 3.1.1: Determining Area Under a Graph Using Area FormulasDefinitionsLet fbe a continuous and nonnegative function ona,b. The approximate area under the graphis Area~~i=1nf(ci)x, where x=b-an, and ,xi-1cxiExamplesSuppose a car is traveling 65mph for 3 hours. Label the headings in words for the x- and y-axes. Then use the graph to find the total distance traveled.Graph in DesmosLabel the heading for the x- and y-axes as shown in the video. Then use the graph todetermine the total cost and the average cost per phone.Sunset Nursery determines the cost to grow mesquite trees large enough to sell in dollarsper tree tobec(x)=-0.2x+50 where xis the number of trees.Determine the area under the graph on the interval 0,200. Interpret the meaning of thearea.