Writing Equations of Parallel and Perpendicular Lines

What is the defining characteristic of parallel lines?

• They have opposite reciprocal slopes.

• They have different y-intercepts.

• They have the same slope.

• They intersect at a right angle.

If two lines have the same slope but different y-intercepts, what can be said about them?

• They are perpendicular.

• They are parallel.

• They intersect at one point.

• They are identical.

What is the y-intercept of the line with the equation y = 2x - 14?

• -14

• 2

• -2

• 14

Which of the following is true for perpendicular lines?

• They have the same slope.

• They have the same y-intercept.

• They never intersect.

• They intersect at a right angle.

What is the slope of a line perpendicular to a line with a slope of 1/2?

• -2

• -1/2

• 1/2

• 2

How do you find the slope of a line perpendicular to another line?

• Use the same slope.

• Use the same y-intercept.

• Use the negative reciprocal of the slope.

• Use the positive reciprocal of the slope.

What form is used to write the equation of a line given a point and a slope?

• Slope-intercept form

• Standard form

• Point-slope form

• General form

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

• 1/3

• -1/3

• -3

• 3

In the modeling problem, what is the slope of the shoreline?

• -3/2

• 2/3

• -2/3

• 3/2

What is the slope of the helicopter's path if it is perpendicular to the shoreline with a slope of -2/3?

• 3/2

• 2/3

• -3/2

• -2/3