Question

Two points are plotted in the coordinate plane at (-3, 7) and (-3, -9). What is the distance between them?
A) -2
B) 2
C) 6
D) 16

Answer 1

first, count the # of units between them

Answer 2

you could just plot them in a cartesian grid and see how far apart they're :)
or you could also \(\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({\color{red}{ -3}}\quad ,&{\color{blue}{ 7}})\quad
% (c,d)
&({\color{red}{ -3}}\quad ,&{\color{blue}{ -9}})
\end{array}\qquad
% distance value
d = \sqrt{({\color{red}{ x_2}}-{\color{red}{ x_1}})^2 + ({\color{blue}{ y_2}}-{\color{blue}{ y_1}})^2}\)

Answer 3

yeah, that's what I meant.

Answer 4

A because the 2 x axis are on the same axis so take out the negative and 9 plus 7 is 16 but -9 plus positive 7 is -2

Answer 5

thanks i thought it was that but i was a little confused