Comparing Costs and Functions

This video tutorial covers the comparison of functions using tables and equations. It begins with an introduction to the concept, followed by examples involving movie service costs and washing machine payment plans. The tutorial demonstrates how to write equations in slope-intercept form, find slopes and y-intercepts, and compare costs. It concludes with additional tips on comparing functions.

What is the primary focus of this lesson?

• Understanding quadratic equations

• Learning about geometric shapes

• Comparing functions using tables and equations

• Comparing different types of graphs

What is the first step in writing an equation in slope-intercept form?

• Finding the y-intercept

• Graphing the equation

• Choosing any two ordered pairs for the slope formula

• Solving for x

How is the cost of Sam's movie service represented?

• As a table

• As a graph

• As an equation

• As a list

What is the slope of Tala's movie service cost equation?

• 6

• 1

• 5

• 0

Which movie service is less expensive for 20 movies?

• Both are the same

• Tala's service

• Sam's service

• Cannot be determined

What is the down payment for the washing machine at the first store?

• $150

• $100

• $200

• $50

How much does the washing machine cost at the first store after 12 months?

• $750

• $640

• $600

• $700

What is the slope of the cost equation for the second store's washing machine?

• 30

• 40

• 50

• 60

Which store offers a less expensive washing machine after 12 months?

• First store

• Cannot be determined

• Second store

• Both are the same

What is the y-intercept in a slope-intercept equation?

• The point where the line crosses the x-axis

• The x value where y is zero

• The y value where x is zero

• The slope of the line