Final answer:
To estimate the area under a graph using an online calculator, plot the graph, determine the region of interest, and use the online calculator to find the definite integral.
Step-by-step explanation:
To estimate the area under a graph using an online calculator, follow these steps:
Plot the graph of the function or data.
Determine the region of interest.
Use the online calculator to find the definite integral of the function over the desired region.
By calculating the definite integral, you can obtain an estimate of the area under the graph.