On a coordinate grid, what is the distance from A (4,9) to B (4,3)?
just subtract them
4-4=0
9-3=6
the distance is 6 since the x part stayed on the sam line
\(d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\\\ d=\sqrt{(4-4)^2+(9-3)^2}\\ d=\sqrt{0^2+6^2}\\ d=\sqrt{6^2}\\ d=6\)