Question

find midpoint of the following two points (5, 9) and (-11, -15)? (1 point)
(-3, -6)
(-3, -3)
(-6, -3)
(8, 12)

Explanation:

Step1: Recall mid - point formula

The mid - point formula for two points $(x_1,y_1)$ and $(x_2,y_2)$ is $(\frac{x_1 + x_2}{2},\frac{y_1 + y_2}{2})$. Here $x_1 = 5,y_1=9,x_2=-11,y_2 = - 15$.

Step2: Calculate x - coordinate of mid - point

$x=\frac{5+( - 11)}{2}=\frac{5 - 11}{2}=\frac{-6}{2}=-3$.

Step3: Calculate y - coordinate of mid - point

$y=\frac{9+( - 15)}{2}=\frac{9 - 15}{2}=\frac{-6}{2}=-3$.

Answer:

B. (-3, -3)