Question

using equations to represent trend lines
determining the equation or a trend line
use the points to describe the data and determine the line
of best fit.
what type of correlation do the data points represent?
negative
what is the best estimate for the y - intercept?
best represents the data?
800 feet
1,200 feet
1,800 feet
2,200 feet

Explanation:

Step1: Analyze the scatter - plot

As the elevation (x - axis) increases, the temperature (y - axis) decreases. So, there is a negative correlation.

Step2: Estimate the y - intercept

The y - intercept is the value of y when x = 0. Looking at the scatter - plot, if we extend the trend line (visually), when x = 0 (elevation = 0 feet), the y - value (temperature) is around 80°F.

Answer:

The type of correlation is negative and the best estimate for the y - intercept is 80.