Answer:
3x-y=0
Explanation:
given
slope(m)=3
y intercept (c)=0 (as y intercepts at (0,0) )
equation of given straight line is
y=mx+c
y=3x+0
3x-y=0.......(i)
comparing (i) with ax+by+c=0 we get
a=3
b= -1
c=0
line parallel to (i) is
ax+ by + k=0
where k= -bc
then the line parallel to (i) is
3x-y+1×0=0
therefore 3x-y=0 is the required answer