Parallel lines are a fixed distance apart and will never meet, no matter how long they are extended. Lines that are parallel have the same gradient. The graphs above, \(y = 2x + 1\) and \(y = 2x ...

If you are working at Higher tier, make sure you are confident with dividing fractions to work with gradients of perpendicular lines. To show that two lines are parallel, they must have the same ...