Question

the ordinate of a point A on y-axis is 5 and B has co-ordinate a (-3,1) .find the length of AB. one mark question.

Answer 1

the distance is 5 units...soln

Answer 2

AB=
$\sqrt{(0 - ( - 3) {}^{2} + (5 - 1) {}^{2} }$

$\sqrt{9 + 16}$
=5