Slopes of Parallel & Perpendicular Lines

What does it mean if two lines are perpendicular?

• The never intersect
• They intersect
• They intersect and form a right angle
• I don't know

What does it mean if two lines are parallel?

• They never intersect
• They intersect and form a right angle
• The intersect
• I still don't know

In y=mx+b, what does m represent?

• Nothing
• A number
• Slope
• Y-Intercept

In y=mx+b, what does b represent?

• Still Nothing
• Another Number
• Slope
• Y-Intercept

What is the slope of this line?

• 1
• -1
• (1,1)
• 0

What is the y-intercept of this line?

• 1
• -1
• 2
• Undefined

In Slope-Intercept Form, what is the equation of this line?

• y=-x-1
• y=x+1
• y=-1-1
• y=1+1

What is the equation of this line?

• y=1/2 x +4
• y = 4x + 1/2
• y = 2x + 4
• y = 4x + 2

How can we tell if two lines are parallel?

• Slope is equal
• Slope is different
• Y-Intercept is the Same
• Slope is opposite Reciprocal

How can we tell if two lines are perpendicular?

• Slope is different
• Slope is opposite reciprocal
• Slope is equal
• No way to tell