10.2 Practice (Trend Lines)

Front

What is the formula to calculate the slope of a line using two points?

Back

Slope (m) = (y2 - y1) / (x2 - x1)

Front

Given points (2,2) and (4,3), what is the slope of the trend line?

Back

1/2

Front

What is a line of best fit?

Back

A line that best represents the data on a scatter plot, used for making predictions.

Front

What does the slope of a line represent in a graph?

Back

The rate of change between the two variables represented by the line.

Front

If Joe worked 30 hours and earned $600, what is his hourly wage?

Back

$20 per hour.

Front

What is the purpose of trend lines in data analysis?

Back

To identify patterns and make predictions based on data.

Front

How do you interpret a positive slope in a trend line?

Back

As one variable increases, the other variable also increases.

Front

How do you interpret a negative slope in a trend line?

Back

As one variable increases, the other variable decreases.

Front

What is the weight of a person who is 72 inches tall according to the trend line?

Back

About 163 lbs.

Front

If there are 6 people in front of Melissa and she waits 2 minutes per person, how long will she wait?

Back

12 minutes.