Making Predictions with Scatter Plots and Trend Lines

The video tutorial explains how to make predictions using scatter plots with trend lines. It begins with an introduction to trend lines, describing them as lines that best fit the data in a scatter plot. The tutorial then provides detailed instructions on how to draw trend lines accurately, emphasizing the importance of having an equal number of points above and below the line. Several examples are provided, including predicting sleep hours based on Netflix watching, estimating wedding catering costs, calculating total costs at a farmer's market, and determining basketball shooting distances. Each example demonstrates the application of trend lines for making predictions.

What is the primary purpose of a trend line in a scatter plot?

• To divide the plot into equal halves

• To accurately predict future data points

• To highlight the outliers in the data

• To best fit the data and make predictions

When drawing a trend line by hand, what tool is recommended for accuracy?

• A pencil

• A protractor

• A ruler

• A compass

How should a trend line be adjusted if there are more points below it than above?

• By making it steeper

• By moving it higher

• By moving it lower

• By making it horizontal

What is a key characteristic of a correctly drawn trend line in a scatter plot?

• It must be a curved line

• It should only connect the highest and lowest points

• It should have an equal number of points above and below it

• It must pass through every data point

What is the best prediction for hours of sleep if a middle schooler watches two hours of Netflix?

• 8 hours

• 5 hours

• 7 hours

• 6 hours

How many hours of Netflix would a middle schooler likely watch if they sleep for eight hours?

• 0.25 hours

• 1 hour

• 0.75 hours

• 0.5 hours

What is the estimated catering cost for a wedding with 100 guests?

• $1075

• $1000

• $925

• $850

For catering that costs $200, how many guests are likely to be at the wedding?

• 10 guests

• 25 guests

• 20 guests

• 15 guests

What is the predicted total cost if someone purchases seven items at the farmer's market?

• $42

• $40

• $37

• $35

If Jimmy made three baskets, how far was he likely from the hoop?

• 12 feet

• 13 feet

• 14 feet

• 15 feet