Exploring Algebra Concepts for Grades 4-8

What is the algebraic definition of parallel lines?

• Lines that intersect at a right angle

• Lines that intersect at any angle

• Lines that have the same slopes

• Lines that have different slopes

What is the product of the slopes of perpendicular lines?

• Infinity

• Zero

• One

• Negative one

If the slope of a line is 3, what is the slope of a line perpendicular to it?

• -1/3

• 1/3

• -3

• 3

Which of the following pairs of lines are parallel?

• y = 4/3x + 3 and y = 4/3x - 5

• y = 2x + 1 and y = -2x + 1

• y = 3x + 1 and y = -1/3x + 1

• y = x + 2 and y = -x + 2

What is the slope of the line y = -1/2x - 2?

• 1/2

• -1/2

• 2

• -2

Which of the following pairs of lines are perpendicular?

• y = 4x + 1 and y = 1/4x + 1

• y = x + 2 and y = x - 2

• y = 2x + 1 and y = 2x - 1

• y = 3x + 2 and y = -1/3x + 2

What is the slope of a line perpendicular to a line with slope -4?

• 1/4

• -4

• -1/4

• 4

What is the slope of a line parallel to y = x + 5?

• -1

• 1

• 0

• 5

What is the slope of a line perpendicular to y = 7x + 1?

• -1/7

• 1/7

• -7

• 7

What is the y-intercept of the line y = -1/7x + 34/7?

• 34/7

• -1/7

• 34

• 1/7