If two lines, written in standard form, are a1x + b1y = c1 and a2x = b2y = c2, what is the relationship of a1, a2, b1, and b2 if the lines are parallel?
hello : a1x + b1y = c1 ....(1) a2x = b2y = c2,....(2) the lines are parallel when has same slope calculate the slope of the line (1) : a1x + b1y = c1 b1y = c1 - a1x if : b1 ≠ 0 : y = (-a1/b1)x +c1/b1 the slope is : -a1/b1 same method the slope of the line (2) is : -a2/b2 the relationship of a1, a2, b1, and b2 if the lines are parallel is : -a1/b1= -a2/b2
