Parallel and perpendicular

What does "m" represent in y=mx+b?

• y-intercept
• slope
• measurements
• nothing

What does 'b" represent in y=mx+b

• y-intercept
• base
• nothing
• slope

Slopes of parallel lines are...

• opposite reciprocals.
• opposites.
• the same.
• always 7.

Slopes of perpendicular lines are...

• opposite reciprocals.
• opposites.
• the same.
• always 7.

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

• Parallel
• Perpendicular
• Neither
• The same line

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

• Parallel
• Perpendicular
• Neither

y = 6x + 2
y = -6x + 2
These lines are...

• Parallel
• Perpendicular
• Neither

If the lines are parallel to each other and the slope of the blue line is 1/4, what is the slope of the purple line?

• 4

• -4

• 2

• -2