Materi Ekonomi Kelas X IPS | Cara Menghitung Keseimbangan Pasar Qd=Qs atau Pd=Ps

Summary

In this video, the presenter explains how to calculate market equilibrium using a demand and supply function. The given example uses the demand function for oranges (QD = 796 - 0.05P) and the supply function (QS = 100 + 0.025P). The presenter guides viewers step-by-step to determine the equilibrium price (P) and quantity (Q). By solving the equations, the equilibrium price is found to be Rp 8,000, with an equilibrium quantity of 300 units. The tutorial is designed to help viewers understand how to apply market equilibrium formulas for real-world economic problems.

Takeaways

• 😀 The script explains how to calculate market equilibrium using supply and demand functions.
• 😀 The demand function is given as Qd = 796 - 0.05P and the supply function as Qs = 100 + 0.025P.
• 😀 To find equilibrium, two key elements must be determined: the equilibrium price (P) and equilibrium quantity (Q).
• 😀 The general formula for finding equilibrium is Qd = Qs, meaning the quantity demanded equals the quantity supplied.
• 😀 The script uses the formula Qd = 796 - 0.05P and Qs = 100 + 0.025P to solve for the equilibrium.
• 😀 By equating both functions, we find the relationship between the price (P) and quantity (Q).
• 😀 After solving for P, the equilibrium price is determined to be Rp8,000.
• 😀 Once the equilibrium price is found, the next step is to calculate the equilibrium quantity.
• 😀 Substituting the equilibrium price into the demand function yields the equilibrium quantity, which is 300 units.
• 😀 The final market equilibrium values are: Price = Rp8,000 and Quantity = 300 units.

Q & A

What is the main objective of the video script?

The main objective of the video is to explain how to calculate market equilibrium using the demand and supply functions.

What are the given demand and supply functions in the problem?

The given demand function is QD = 796 - 0.05P and the supply function is QS = 100 + 0.025P.

What are the two key things we need to find when calculating market equilibrium?

We need to find the equilibrium price (P) and the equilibrium quantity (Q).

Which formula is used to determine market equilibrium?

The formula QD = QS (or alternatively, PD = PX) is used to determine market equilibrium.

Why is the equilibrium condition QD = QS used?

The equilibrium condition QD = QS is used because at equilibrium, the quantity demanded is equal to the quantity supplied in the market.

How do you solve for the price (P) in the market equilibrium?

To solve for P, we equate the demand and supply functions, then isolate P by rearranging the terms and solving the resulting equation.

What is the calculated equilibrium price (P) in this example?

The calculated equilibrium price (P) is Rp8,000.

How do you calculate the equilibrium quantity (Q)?

To calculate the equilibrium quantity, substitute the equilibrium price (P = 8,000) into either the demand or supply function and solve for Q.

What is the equilibrium quantity (Q) in this example?

The equilibrium quantity (Q) is 300 units.

Why do we rearrange the equation and move terms across during the calculation?

Rearranging the equation helps simplify the process by isolating variables and solving for P or Q efficiently, ensuring that the values are correctly balanced.