In last week, I learnt about parallel and perpendicular.
Parallel means same slope of two lines
Perpendicular means 90 degrees of two lines.
solving rule example 0- (x.y) (x1,y1) x+ (-x1) =denominator
y+(-y1) = numerator so y+(-y1)/ x+(-x1) = slope and.. lastly, change denominator and numerator, and change + or – to opposite one.
therefore , -{x+(-x1)/y+(-y1)}
parallel example
it has same slope, like y=x+1 = y=x+1 / // / / same
example
Formula – y= slope * x + y intercept
y = 2x + 1
2 = slope
1 = y intercept.