Question

The distance of points A (5,-7) from y-axis is :
(a) –7
(b) 5
(c)6
(d) 0​

Answer 1

Your answer is 5 not -7...
-7 is incorrect.

Answer 2

The distance of points A (5,-7) from y-axis is 5 units.

Distance of a given point from the y-axis is generally the x-coordinate

Distance of a given point from the x-axis is generally the y-coordinate

Also we know,

Distance of a point ( x1, y1) from a given line ax+by + c= 0 is given by:

(ax1 + by1 + c)/ (a^2 + b^2)^1/2

Here, equation of the given line( y-axis) is x= 0

So, Distance of the point (5,-7) from the given line is:

(1*5)/ √1 = 5 units.