Posted by Karen on Sunday, October 17, 2010 at 3:02pm.
slope is tangens of angle betwen x-axis and line.
Firs 5 question is O.K
Sorry. Answer for question 5 is not correct.
2x+3y=4 , 3y=-2x+4 (Divided with 3)
y=(-2/3)x+4/3 Slope (-2/3)
3x+2y=6 , 2y=-3x+6 (Divided with 2)
(1/2)x+2y=1 , 2y=(-1/2)x+1
(Divided with 2) y=(-1/4)x+1/2
4x-y=3 , y=4x-3 (Slope 4)
6x-9y=4 , -9y=-6x*4 (Divided with -9)
y=(2/3)x-4/9 Slope (2/3)
(2/3)x-y=11 , y=(2/3)x-11 Slope (2/3)
Best way to check that is that you drive this lines in grid.Is enough 2 points for any lines.
For question 5 draw lines
(-2/3)x+4/3 and y=(-3/2)x+3
For question 6 draw lines
(-1/4)x+1/2 and y=4x-3
For question 7 draw lines
(2/3)x-4/9 and (2/3)x-11
For all values of x y=7
That is line parallel with x-axis
3x=5 (divided with 3)
For all values of y x=5/3
That is line p0arallel with y-axis
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