Question

skill rating vs hours of practice
what type of trend is shown in the scatterplot of hours practiced and skill rating
question 6
between 3.8 and 6.3 hours of practice, the musicians skill rating increases by about points.
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Explanation:

Step1: Locate the skill rating at 3.8 hours

From the scatter - plot, when the hours of practice is \(x = 3.8\), the skill rating \(y_1\approx7\)

Step2: Locate the skill rating at 6.3 hours

From the scatter - plot, when the hours of practice is \(x = 6.3\), the skill rating \(y_2\approx9\)

Step3: Calculate the increase in skill rating

The increase in skill rating \(\Delta y=y_2 - y_1\). Substitute \(y_1 = 7\) and \(y_2 = 9\) into the formula, we get \(\Delta y=9 - 7=2\)

Answer:

2