Question

which method could you use to calculate the y-ordinate of the midpoint of the vertical line with end points (0, 0) and (0, -12)

Answer 1

we can simply just draw them, notice it is a vertical line

Check the picture below.

Answer 2

For this case we have that by definition, the midpoint is given by:

$(\frac{x_ {1} + x_ {2}} {2}, \frac {y_ {1} + y_ {2}} {2})$

We have the following extreme points of a line:

$(x_ {1}, y_ {1}) :( 0,0)\\(x_ {2}, y_ {2}) :( 0, -12)$

Substituting in the formula we have:

$(\frac{0 + 0}{2}, \frac {0-12} {2})\\(\frac {0} {2},\frac {-12} {2})\\(0, -6)$

We have that the midpoint is (0, -6)

Answer:

(0, -6)