Understanding and using slopes

7 : 10

63: __?___

• 80

• 90

• 60

• 100

Which Angles Theorem proves the lines are parallel?

• Corresponding

• Converse of Corresponding

• Consecutive

• Converse of Consecutive

Are the lines Perpendicular? How do you know?

Line 1 runs through the point (0, -1) and (7, 1)

Line 2 runs through the point (-1, 4) and (2, -5)

• Yes, their slopes are opposite reciprocals

• No, their slopes are not opposite reciprocals

• Yes, their slope are the same

• No, their slopes are not the same

Find the value of x so that the line thru the points has the slope of 2/9. The coordinates are (-6, 2) and (x, 4)

• 0

• 3

• 7

• -2

Two lines that are parallel lines have ...

• Slope that is opposite reciprocals

• No Slope

• Slope that is the same

• none of the above

• 1 & 2
• 2 & 3
• 1 & 3
• None of them

Find missing side

• 5
• 7
• 9
• 11

Find the missing coordinate:
(9, a) and (21, 14); slope = 2/3

• -6
• 6
• 7
• -7

Are the given lines parallel, perpendicular, or neither?

 $y=\frac{1}{2}x+2$  and $y=\frac{1}{2}x-4$  

• Parallel

• Perpendicular

• Neither

Slopes of perpendicular lines are...

• negative reciprocals

• the same

• opposites

• always negative