First determine the slope of the line by picking 2 coordinates on the graph. X1=8,y1=240. X2=10,y2=300. Now plug in the slope formula. (300-240)/(10-8) . The slope is the rise(y2-y1)/(x2-x1)
Now to get the y intercept use the equation y=mx+b. The y intercept is where y=0
Therefore the equation of the line is y=30x+b
I hope this helps. Please best this answer.
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