Are the equation y = 3x + 7 and y = -3x + 7 parallel?
2 Answers
Sep 14, 2015
They are not parallel
Explanation:
They are not parallel, because their slopes are different, Slope of the first one is 3 and the slope of the second one is -3.
Sep 14, 2015
One is slope and the other way find the determinant of the matrix which should be zero for parallel lines
Write slope and intercept in matrix form
First row = (C11 C12) = (3 7)
Second row = (C 21 C22) = (-3 7)
Calculation of determinant for 2X2 matrix = C11C22 -(-C12C21)
i.e. (37- (-37) = 42 whic is not equal to zero
3 7
Hence these lines are not parallel
