(a) y = –9x + 1 (b) y = 9x + 1 (c) y = x + 1
(d) y = –9x + 3
2007-08-29 05:56:16 · 6 answers · asked by Gabriela R 1 in Science & Mathematics ➔ Mathematics
(a) and (d) have the same slope (gradient) of (-9)
(a) and (d) represent parallel lines.
2007-09-02 00:54:38 · answer #1 · answered by Como 7 · 0⤊ 0⤋
The answers are a and d. Here's why:
Lines that are parallel have the same slope. If you can get the equations into the form y = mx + b (already done), the slope is m. In this case, both a and d have slopes of -9.
2007-08-29 13:04:25 · answer #2 · answered by aceoffreaks 2 · 1⤊ 0⤋
Parallel lines have the same slope.One of the advantages of having a linear equation in Standard Form (y=mx+b), is that the coefficient of the x term, m,
is the slope.
All four of your equations are already in Standard Form, so it only remains to find two coefficients of x that are identical. a) and d) are both -9. They are parallel.
2007-08-29 13:15:05 · answer #3 · answered by Grampedo 7 · 0⤊ 0⤋
A and B are parallel lines because they have the same slope.
2007-08-31 17:19:47 · answer #4 · answered by RvVT G 1 · 0⤊ 0⤋
2 lines r said 2be ll when their slopes r equal
in the equation y=mx+c ,mis the slope
in (1) m=-9
in(2) m=9
in(3) m=1
in(4) m=-9
therefore a and d r parallel
2007-08-29 13:14:42 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Find the two that have equal slope!
2007-08-29 13:00:45 · answer #6 · answered by Anonymous · 0⤊ 0⤋