Question

What is the midpoint between the points (1, 3) and (5, 7)?

A. (4, 4)
B. (7, 9)
C. (3, 5)
D. (2, 2)

Answer 1

The formula of the midpoint between
`A(x_A;\ y_A)` and
`B(x_B;\ y_B)`


`M_(AB)\left((x_A+x_B)/(2);\ (y_A+y_B)/(2)\right)`

We have
`A(1;\ 3);\ B(5;\ 7)`

Therefore


`M_(AB)\left((1+5)/(2);\ (3+7)/(2)\right)\to M_(AB)\left((6)/(2);\ (10)/(2)\right)\to M_(AB)(3;\ 5)`

Answer: C. (3; 5)