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Lines Of Best Fit Using Slope-Intercept Form Worksheet - Algebra Chapter 4, Section 4.4

Algebra

Name ________________________________________

CHAPTER 4

FUNCTIONS AND LINEAR MODELING

Period ______ Date ____________________________

Section 4.4: Lines of Best Fit Using Slope-Intercept Form

Example 1: This table shows how many grams of fat and how many calories there are in some hamburgers sold

by national chain restaurants.

a. Make a scatter plot of the data. Use (total fat, calories) for

your axes. Label and scale your axes.

b. Use a ruler to draw the line of best fit or trend line.

c. Pick two points that fall on your line (they might not be any of the original given points) and use them to

find the slope of your line.

d. Give the units of measure for the slope, also known as rate of change. Give the real-world meaning of the

slope.

e. Give the y-intercept of your line. Give the real-world meaning of the y-intercept using correct units.

f. Use your answers to write an equation for your line of best fit using slope-intercept form. This equation is a

model for our data.

g. Use your model to predict the calories in a burger with 80 grams of total fat.

h. Use your model to predict the total fat in a burger with 800 calories.

i. What is the x-intercept of your model and what does it represent in this situation?

Lines Of Best Fit Using Slope-Intercept Form Worksheet - Algebra Chapter 4, Section 4.4