Question

Using a graphing calculator, find the slope of the best-fit line for the following data set. Round your answer to four significant digits. (243.5, 101.5) (328.9, 95.47) (482.6, 80.54) (507.6, 72.61) (648.2, 68.82) (731.7, 51.64) (808.8, 43.84) (974.6, 30.34

Answer 1

Answer:

You might be familiar with the idea of calorie intake requirements, such as the guidelines shown in the table below. Use your calculator to find the line of best fit for the data.

Calorie Requirements (Male), 1-59 years

Age Range,

x

1-3 4-6 7-10 11-14 15-18 19-59

Calorie Needs,

y

1230 1715 1970 2220 2755 2550

The age is measured in years.

Finding the Equation of a Best Fit Using a Calculator

• We have already learned how to find the linear equation of best fit by hand. This entire process can also be done by your graphing calculator. It is recommended that you use a graphing calculator for two main reasons: accuracy and consistency. The graphing calculator will be more accurate than a calculation by hand and it will also be more consistent between students, or a greater likelihood that everyone will get the same answer.