Final answer:
The equation P = 2Q + 3 represents a supply curve with a slope of 2. The line can be plotted on a graph by finding the y-intercept and the price when the quantity is 5.
Step-by-step explanation:
The given equation, P = 2Q + 3, represents a supply curve. The slope of a supply curve is equal to the coefficient of Q, which in this case is 2. Therefore, the slope of this supply curve is 2.
To draw the line on the graph, we need to find the y-intercept and the price when the quantity is 5. Substituting Q = 5 into the equation, P = 2(5) + 3, we find that P = 13. So, the coordinates for the y-intercept are (0,3) and for the point when Q = 5 are (5,13).