1 Answer
<p>The supply curve is plotted as a line with an upward slope, pointing up and to the right. If the available quantity of the good increases, the supply curve shifts right. If quantity decreases, the supply curve moves leftThe demand curve is plotted as a line with a negative slope, pointing down and to the right. If the quantity demanded increases, the downward-sloping demand curve moves right. If demand decreases, the curve moves left. </p>