Unit 4 Test - Slope

Which is a correct definition of perpendicular lines?

• A part of a line that is bounded by two distinct endpoints

• A set of points that extends infinitely in two directions

• Two lines that intersect at a right angle

• Two lines that never cross

Which statement best describes parallel lines?

• Parallel lines intersect at exactly one point.

• Parallel lines intersect infinitely many times.

• Parallel lines have opposite reciprocal slopes.

• Parallel lines have the same slopes.

Which statement is true?

• Parallel lines never intersect.

• Parallel lines always intersect at 90° angles.

• Parallel lines always intersect.

• Parallel lines sometimes intersect at 90° angles.

Which statement best describes perpendicular lines?

• Perpendicular lines never intersect.

• Perpendicular lines intersect infinitely many times.

• Perpendicular lines have the same slopes.

• Perpendicular lines have opposite reciprocal slopes

What is the slope of a line parallel to the graph y - 2 = 4(x + 1)?

• m = 2

• m = 3

• m = 4

• m = 6

What is the slope of a line parallel to the line shown in the graph.

A line passes through points (-3, 1) and (2, -3).  What is the slope of the line perpendicular to that line?

 Consider the pairs of lines given.  Which pair(s) represent(s) perpendicular lines?

(There can be more than one answer, check all that apply)