Finding Endpoints from Midpoints

What are the coordinates of point A?

• (1, -4)

• (0, 0)

• (3, 2)

• (5, 8)

What is the midpoint given in the problem?

• (0, 0)

• (1, -4)

• (3, 2)

• (5, 8)

Which formula is used to find the midpoint between two points?

• X1 - X2, Y1 - Y2

• (X1 - X2) / 2, (Y1 - Y2) / 2

• (X1 + X2) / 2, (Y1 + Y2) / 2

• X1 + X2, Y1 + Y2

If you score 80% and 100% on two tests, what is the average score?

• 85%

• 80%

• 90%

• 100%

What is the equation for the x-coordinate of the midpoint?

• x / 2 = 3

• x - 1 = 5

• (1 + x) / 2 = 3

• 1 + x = 6

What is the equation for the y-coordinate of the midpoint?

• (y + (-4)) / 2 = 2

• (y - 4) / 2 = 2

• y + 4 = 8

• y / 2 = 4

What is the value of x after solving the equation 1 + x = 6?

• 7

• 6

• 5

• 4

What is the value of y after solving the equation -4 + y = 4?

• 8

• 7

• 9

• 6

What are the coordinates of the other endpoint B?

• (0, 0)

• (3, 2)

• (1, -4)

• (5, 8)

What should you do if you are not convinced by the solution?

• Ask someone else

• Verify by plugging the values back into the midpoint formula

• Ignore it

• Recalculate the midpoint