### Home > CCAA8 > Chapter 6 Unit 7 > Lesson CCA: 6.1.3 > Problem 6-24

Graph the points.

From the graph, determine if the scatterplot is linear or curved.

Is the slope positive or negative?

How close are the data points to your line or curve?

Are there any outliers?

How long do you predict a cold will last for a person who has not taken the supplement?

Estimate the line of best fit. Remember that the equation of your line does not have to exactly match what the table shows.

Find the *y*-intercept and slope to write the equation of your line.

Substitute 1.5 for *x*.

The residual is the difference between the actual value and the predicted value.

How long do you predict a cold to last for a person who has not taken any supplement?

Input the data into the table in the eTool below to graph the results.

Click the link at right for the full version of the eTool: 6-24 HW eTool.