# SOLUTION: Determine which two equations represent parallel lines. (a) y = 9x &#8211; 7 (b) y = &#8211;9x + 7 (c) y = 9x + 3 (d) y = -1/9x &#8211; 7 I have no idea even how to begin t

Algebra ->  Algebra  -> Trigonometry-basics -> SOLUTION: Determine which two equations represent parallel lines. (a) y = 9x &#8211; 7 (b) y = &#8211;9x + 7 (c) y = 9x + 3 (d) y = -1/9x &#8211; 7 I have no idea even how to begin t      Log On

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 Question 104032: Determine which two equations represent parallel lines. (a) y = 9x – 7 (b) y = –9x + 7 (c) y = 9x + 3 (d) y = -1/9x – 7 I have no idea even how to begin to figure this out. Answer by scott8148(6628)   (Show Source): You can put this solution on YOUR website!parallel lines have the SAME slope ... the equations are in slope-intercept form so the two where the x terms have the same coefficient are the ones you want