Making a line graph into a curve graph & finding the area

Hi guys,

Please refer to the attachment.

I want to plot a curve graph instead of a straight line graph.
And how do i find the area under the graph?

Thanks in advance

you need to calculate the area mathematically, not graphically. Use the integral of the function with the limits that you plot

e.g. f(x)=x then integral of the f(x) is 1/2 * x^2 with the limits from 0 to 50 you get the area: 1250

in order to look like a curve, you need more points between the existing ones in order for the segments to be small enough to blend into a curve.
because I do not believe it can be described by a single equation, in order for you to calculate the area, you will need to break the graph into few subgraphs and then calculate the areas for each subgraph.

Visually you can smooth the line via the Format dialog, but that will make the area under the curve incorrect.