Algebra 1 : Midpoint Formula

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #11 :How To Find The Midpoint Of A Line Segment

A line segment on the coordinate plane has endpointsand. Which quadrant or axis contains its midpoint?

Possible Answers:

The-axis

Quadrant I

Quadrant IV

Quadrant II

第三象限

Correct answer:

Quadrant II

Explanation:

The-coordinate of the midpoint is

,

which is negative.

The-coordinate of the midpoint is

,

which is positive.

Since the midpoint has a negative-coordinate and a positive-coordinate, the midpoint is in Quadrant II.

Example Question #12 :How To Find The Midpoint Of A Line Segment

A line segment on the coordinate plane has endpointsand. Which quadrant or axis contains its midpoint?

Possible Answers:

Quadrant IV

Quadrant II

The-axis

第三象限

Quadrant I

Correct answer:

Quadrant I

Explanation:

The-coordinate of the midpoint is

,

which is positive.

The-coordinate of the midpoint is

,

which is positive.

Since both coordinates are positive, the midpoint is in Quadrant I.

Example Question #13 :How To Find The Midpoint Of A Line Segment

Determine the midpoint between the pointsand

Possible Answers:

Correct answer:

Explanation:

To find the midpoint you are actually finding the average of the twovalues and the average of the twovalues.

Midpoint formula:

,so we plug our points in to the equation,

Simplify and divide

Midpoint:

Example Question #14 :How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with endpointsand.

Possible Answers:

Correct answer:

Explanation:

Use the midpoint formula:

Substitute:

The midpoint is

Example Question #15 :How To Find The Midpoint Of A Line Segment

Find the midpoint of the line segment with endpointsand.

Possible Answers:

Correct answer:

Explanation:

Use the midpoint formula:

Substitute:

The midpoint is.

Example Question #16 :How To Find The Midpoint Of A Line Segment

一条线的中点与en是什么dpoints ofand?

Possible Answers:

Correct answer:

Explanation:

To find the midpoint, you can use the midpoint formula:.

Plug inandinto the formula:to get.

Example Question #5 :Midpoint Formula

Find the midpoint of the line segment with endpointsand.

Possible Answers:

Correct answer:

Explanation:

Use the midpoint formula:

Substitute:

The midpoint is

Example Question #17 :How To Find The Midpoint Of A Line Segment

一条线的中点与en是什么dpoints (2,5) and (18,-9)?

Possible Answers:

Correct answer:

Explanation:

To find the midpoint of the line, plug the endpoints into the distance formula:. This will give you, or a midpoint of.

Example Question #18 :How To Find The Midpoint Of A Line Segment

一条线的中点与en是什么dpoints of (12,3) and (28,9)?

Possible Answers:

Correct answer:

Explanation:

To find the midpoint of a line, plug the endpoints into the midpoint formula:

This gives you

or

Example Question #21 :Midpoint Formula

一条线的中点与en是什么dpoints ofand?

Possible Answers:

Correct answer:

Explanation:

To find the midpoint of the line, plug the endpoints into the midpoint formula, which is

Doing this gives you

or

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