You start out with $20 and then spend money in a store where every item is $3. Y = -3x + 20. Type how to graph the equation using the y-intercept and slope. Tell where you place the first point and how to find the location of the second point.
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You should always plot the x and y intercepts. Then connect them to graph the line.
plot the y intercept first then use the slope to find the other points
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so your equation is in Y=mx+b, so m (the slope) is -3 and b (y intercept) is 20
So your first point will at 20 on the y-axis then since your slope is -3 you will go down 3 and over 1 to the right this is your second point