2007-04-04 22:54:13 · 8 answers · asked by Case 1 in Science & Mathematics ➔ Mathematics
Pick two points on the line... (0, 9) and (1, 7).
Slope is then (9-7)/(0-1) = -2/1 = -2.
Or if you express the line in the standard form y = mx + b, then m is the slope.
So, if you rearrange the above, you get y = -2x + 9, and the slope is again -2.
2007-04-04 23:02:46 · answer #1 · answered by exiguosity 2 · 0⤊ 0⤋
2x + y = 9 can be written as y = - 2x + 9 and is of the form y = mx + c
Thus m the slope is - 2
2007-04-05 06:12:21 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
You can either solve for y to get your linear equation into y=mx+b form and read off the slope "m," or you can use a little trick when the linear equation is in standard form Ax + By = C. Then the slope is -A/B = -2/1 = -2.
2007-04-05 07:01:58 · answer #3 · answered by Kathleen K 7 · 0⤊ 0⤋
If you can write an equation in the form y = mx + b, we know that m is our slope.
Here we start with:
2x + y = 9
1) subtract 2x from both sides
y = 9 - 2x
2) rearrange terms
y = -2x + 9
Our slope is -2. This means for any increase in x by one, our y will decease by 2.
--charlie
2007-04-05 05:58:40 · answer #4 · answered by chajadan 3 · 1⤊ 0⤋
-2
2007-04-05 05:58:46 · answer #5 · answered by John S 6 · 0⤊ 0⤋
-2
2007-04-05 05:58:18 · answer #6 · answered by Anonymous · 0⤊ 0⤋
y=-2x+9
the slope is -2
-----
always :try to put given expressions under this general form of lines equation
y=ax+b
2007-04-05 05:57:26 · answer #7 · answered by Anonymous · 0⤊ 0⤋
well if your using the gradient formula y=mx+c ...wich looks lyk u r. m=slope/gradient so in ur equation u put it into the gradient formula making so '-2' shud be the slope. hope this helps!!!
2007-04-05 06:04:04 · answer #8 · answered by Anonymous · 0⤊ 0⤋