Check If Lines Are Parallel

Given two lines, determine whether or not they are parallel.

Lines are represented by a list [a, b, c], which corresponds to the line ax+by=c.

Examples

lines_are_parallel([1, 2, 3], [1, 2, 4]) ➞ True
# x+2y=3 and x+2y=4 are parallel.

lines_are_parallel([2, 4, 1], [4, 2, 1]) ➞ False
# 2x+4y=1 and 4x+2y=1 are not parallel.

lines_are_parallel([0, 1, 5], [0, 1, 5]) ➞ True
# Lines are parallel to themselves.

Notes

• Two lines are parallels if they have the same slope. If the slopes are different, the lines are not parallel.
• All test cases use valid input (no lists of the wrong size, for example).
• All coefficients will be integers (whole numbers).