+ We enter our data and plot it.

Input := 

data = {{10,.02},{40,.1},{70,.21},{90,.45},
			{100,.5},{120,.65},{125,.75},{150,.9},{175,.98}};
Input := 

dataPlot = ListPlot[data,PlotStyle->{PointSize[.02]},
		PlotRange->{{0,200},{0,1}},
		AxesLabel->{"Mass of Rock",
		"% saying mass > 100 g"}]
Output =

-Graphics-