Determine which two equations represent parallel lines.
(a) y = –3x + 1(b) y = 3x + 1(c) y = x + 1
(d) y = –3x + 2
2007-02-04 16:10:58 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A and D, as they have thge same slope (-3)
2007-02-04 16:14:12 · answer #1 · answered by Anonymous · 0⤊ 0⤋
By inspection the only two possibilities that exist are answers
(a and d) or (b and c)
The reason being the slopes of a and d are both negative,
b and c are both positive.In order to have a parrallel line they must both have the same slope.
The answer is a and d.
answers b and c are wrong because they intersect at (0,1) and have different slopes..
answer a and d works because
the slope is -3 for both lines and they cross the y axis at (0,1)
and (0,2) respectively. when y is zero x=1/3 and 2/3 respectively.
They cross at the x and y axis at different points, have the same slope no intersection.
Jon
2007-02-05 01:00:02 · answer #2 · answered by jon d 3 · 0⤊ 0⤋
a and d have the same slope, -3, and are parallel
2007-02-05 00:18:51 · answer #3 · answered by Scott 2 · 0⤊ 0⤋
A and D, cause they are both -3 in slope. they will run downward from left to right. choice B and C will run upward from left to right, but B will run steeper and through the origin.
2007-02-05 00:24:10 · answer #4 · answered by alleleone81 2 · 0⤊ 0⤋
(a) and (d). They both have the same slope of -3.
2007-02-05 00:22:52 · answer #5 · answered by Northstar 7 · 0⤊ 0⤋