SOLUTION: Determine which two equations represent parallel lines.
(a) y = 9x – 7 (b) y = –9x + 7 (c) y = 9x + 3 (d) y = x – 7
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-> SOLUTION: Determine which two equations represent parallel lines.
(a) y = 9x – 7 (b) y = –9x + 7 (c) y = 9x + 3 (d) y = x – 7
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You can put this solution on YOUR website! Let's use the slope-intercept form because these equations are in that form.
NOTE:Lines are parallel if and only if their slopes are equal.
In this form, m is the slope.
So, we will find a pair with the same slope.
a)m=9
b)m=-9
c)m=9
d)m=1
Thus, a) and c) are parallel. Wanna see some proof? Look below!
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