Answer:
value of a = 0
Step-by-step explanation:
becaus if the point Lies on y Axis then x=0
a=x
b=y
if IT the point was on x Axis then
y=0
the formule y= a.x+b
is used when a is asked
in this case we don't need to use the formule because a =y
if the point Lie on y
