If two lines having slopes m1 and m2 are parallel to each other, then which of the following is correct?
If two straight lines are parallel only when their slopes are equal.
Slope's defined as m= tanθ=yx
If above given two lines are parallel ratio of y-intercept to x-intercept must be equal.
So, any lines parallel to y=m1x+c is of the type y=m2x+d.
∴ m1=m2