Measure the distance between the point where the line intercepts the Y axis and the origin
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You have to put a line of best fit onto the graph and find where that line crosses the y-axis.
Draw a line of best fit through the plotted points which will give the y intercept. Draw a right angle triangle under the line which will be the triangles hypotenuse. Divide the vertical units of the triangle by the horizontal units which will give the value of the slope.
Plot the y-axis, which is the b in the y=mx+b in the slope intercept equation. Then, you put your slope and plot the line.
The x is the domain, and the y is the range. (:
X axis is across and Y axis is down