Equations, Correlations, and Lines
1. Solve.
2.
y
6
5
4
3
2
1
­6
­5
­4
­3
­2
­1
0
­1
­2
­3
­4
­5
­6
3. A line has
• The same slope as the line 4x – 3y + 15 = 0
• The same y­intercept as the line 2x + y + 6 = 0
Determine the equation of this new line
x
1
2
3
4
5
6
4. The cost of a large pizza at Mathville’s Famous Pizzeria (MFP) is given in the table below.
a) This data represents a linear relation. Explain how that can be determined without graphing.
b) Determine the slope of this line. What does the slope represent in the context of this question?
c)
Determine an equation which relates the cost of a large pizza to the number of toppings.
Be sure to identify your variables.
5. Statsville’s Fitness Emporium offers 2 types of gym memberships. They have displayed
the information about the 2 different memberships (A and B) on the graph below.
A
B
a) From the graph, state the point of intersection.
b) What does the point of intersection mean in the context of this question?
c) Under what conditions would someone choose to purchase membership B? Be specific.
6. Write the equation 4x – 5y + 12 = 0 in the form y = mx + b.
Homework: Chapters 4­6: Pg. 356: all