A1 - Unit 9 Test - Systems of Equations

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• the same

• reciprocals

Slopes of perpendicular lines are...

• opposite reciprocals.
• opposites.
• the same

• reciprocals

A line is parallel to   y = 2x - 7.
What is it's slope?

• -2
• 2

A line is perpendicular to    y = 2x - 7.
What is the slope of this line? 

• -2
• 2

• Parallel
• Perpendicular
• Neither

• Parallel
• Perpendicular
• Neither

• Parallel

• Perpendicular

• Neither

The solution of a system of linear equations is...

• the y-intercept (b)
• the intersection of the two equations on a graph
• an ordered pair (x, y) that works for just one of the equations.

• the slope (m)

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• perpendicular lines

• overlapping lines

This system has _____ solutions

• 0
• 1
• 2
• Infinitely many