Step 1: Identify the data points and their weights. The data points are (10, 2), (20, 3), and (30, 5). Here, 10, 20, and 30 are the values, and 2, 3, and 5 are their corresponding weights.
Step 2: Multiply each value by its weight. Calculate: 10 * 2 = 20, 20 * 3 = 60, and 30 * 5 = 150.
Step 3: Add the results from Step 2 together. Calculate: 20 + 60 + 150 = 230.
