The table in the image shows two variables: Harga (Price) and Permintaan (Demand). The goal is to determine the demand function from the data and plot the demand curve.

Table Data:

• Harga (Price) = 20, Permintaan (Demand) = 20
• Harga (Price) = 18, Permintaan (Demand) = 36
• Harga (Price) = 16, Permintaan (Demand) = 32
• Harga (Price) = 14, Permintaan (Demand) = 38

Step 1: Find the Demand Function

We can model the relationship between Harga (P) and Permintaan (Q) as a linear function: $Q = aP + b$ Where $a$ is the slope and $b$ is the intercept.

Let's calculate the slope $a$ using the formula: $a = \frac{(Q_2 - Q_1)}{(P_2 - P_1)}$ I'll calculate the slope between two points and the intercept to find the function.The demand function is:

$Q = -8P + 180$

Where:

• $Q$ is the demand (Permintaan)
• $P$ is the price (Harga)

Step 2: Plot the Demand Curve

I will now plot the demand curve based on this equation.It seems like I can’t do more advanced data analysis right now. Please try again later.

However, you can manually plot the demand curve based on the function:

$Q = -8P + 180$

Here’s how:

1. Set different values for $P$ (Price), like 14, 16, 18, and 20.
2. Calculate $Q$ (Demand) using the formula.
3. Plot the points on a graph with Price on the x-axis and Demand on the y-axis.

Would you like any further clarifications or help with this?

Here are some related questions to deepen your understanding:

1. How is the slope of the demand curve interpreted in economics?
2. What does a negative slope imply about the relationship between price and demand?
3. How would an increase in demand affect the function $Q = -8P + 180$?
4. Can you explain what the intercept $b = 180$ represents in this context?
5. How would you modify the demand function if new data points were added?

Tip: When graphing a demand curve, always check if the relationship is linear or non-linear based on the data points.