3. a. What trend line, in slope-intercept form, models the data from the Example 2 Try it?
b. Explain why there could be no data points on a trend line,
yet the line models the data.
EXAMPLE 2 Understand Correlation
How can the relationship between the hours after sunrise, x, and the
temperature, y. be modeled?
The data points on the scatter plot approximate a line. Sketch a trend line
that best fits the data to determine whether a linear function can model the
relationship
Temperature After Sunrise
dy
72
I
68
Temperature (7)
The trend line suggests
that a linear function can
model the relationship
64
60
2 4 6 8 10
Hours After Sunrise