Question

Sally’s house is located at (5, −1) and her school is located at (−9, 7). Her best friend Molly lives at

the midpoint of Sally’s house and school. What coordinate represents Molly’s house?
A. (2, −3) B. (−2, 3) C. (3, −2) D. (−3, 2)

Answer 1

b

Explanation:

-9+5=-4÷2=-2

-1+7=6÷2=3

Answer 2

B. (−2, 3)

Explanation:

To find the midpoint of a segment, add the x-coordinates of the endpoints and divide by 2. Add the y-coordinates of the segments and divide by 2.

x: (5 + (-9))/2 = -2

y: (-1 + 7)/2 = 3

Midpoint: (-2, 3)

Answer: B. (−2, 3)