Chapter 4 Review

If two lines are parallel their slopes are  ____________

• the same.
• negative reciprocals of each other.

If two lines are perpendicular to each other their slopes are ____________

• the same.

• negative reciprocals of each other.

y = -2/3x + 2
y = 3/2x + 9
These lines are...

• Parallel
• Perpendicular
• Neither

Write an equation that is parallel to the line
y = x - 5 through (1, -2)

• y = -3x +1
• y = x - 3
• y = x + 1
• y = 3x +1 

What type of correlation does this graph have?

• positive linear

• negative linear

• none

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

What type of correlation does this graph show?

• positive linear

• negative linear

• none

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

What type of correlation does this graph have?

• positive linear

• negative linear

• none

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours