Question

based on the scatter plot below, which is a better prediction for y when x = 31? 42 73

Explanation:

Step1: Observe the scatter - plot trend

As x increases from 20 to 40, y generally decreases. When x = 20, y values are around 80 - 90, and when x = 40, y values are around 50 - 60.

Step2: Estimate for x = 31

Since 31 is between 20 and 40, and following the decreasing trend, a value of y = 73 is too high as it is in the range of y - values for smaller x - values near 20. A value of y = 42 is too low as it is in the range of y - values for larger x - values near 60. But considering the trend, a better estimate among the two given values for x = 31 is 73 as it is more consistent with the general decreasing pattern from x = 20 to x = 40.

Answer:

73