Next, we will sketch a trend line to model the scatter plot. Remember that the trend line may vary for each person based where they decided to draw their line of fit.
To write the equation of the line, we should first determine its slope. To do this, we will choose two points on the line. Looking at the graph, we can select the points (20 000,1202) and (30 000,3382). Let's use the Slope Formula!
Now that we know the slope of the line and a point that it passes through, we can write the equation in the point-slope form. Let (20 000,1202) be our reference point.
y-y_1=m(x-x_1)
⇕ [0.5em]
y-1202=0.218(x-20 000)
Finally, we can substitute 42 250 for x and find how much rice would be exported in 2015.
