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vladimir1956 [14]
3 years ago
13

How do you do this!?!

Mathematics
1 answer:
Andrei [34K]3 years ago
6 0

11x + y = 4

<u>x  |   y</u>

0  |   4

\frac{4}{11} |   0

<em>plot the y-intercept (0, 4) and the x-intercept (\frac{4}{11}, 0) </em>

or

11x + y = 4

<u>-11x      </u>  <u>-11x </u>

      y = -11x + 4      ⇒ m = \frac{-11}{1}, b = 4

<em>plot at point the y-intercept "b = 4" (0,4).  plot the next point using the slope "m = \frac{-11}{1}" from point (0,4), count down 11 and to the right 1 (1,-7).</em>

Using intercepts would not provide an accurate graph because you have to estimte where (\frac{4}{11}, 0) is, so it is best to use slope-intercept form.

***********************************************************************************************************

x + y = -2

<u>x  |   y</u>

0  |  -2

-2 |   0

<em>plot the y-intercept (0, -2) and the x-intercept (-2, 0)</em>

or

x + y = -2

<u>-x      </u>  <u> -x </u>

     y = -x - 2     ⇒ m = \frac{-1}{1}, b = -2

<em>plot at point the y-intercept "b = -2" (0,-2).  plot the next point using the slope "m = \frac{-1}{1}" from point (0,-2), count down 1 and to the right 1 (1,-3).</em>

Both methods are easy to use so either can be used.

**********************************************************************************************************

x - 2y = 18

<u>x  |   y</u>

0  |  -9

18 |   0

<em>plot the y-intercept (0, -9) and the x-intercept (18, 0)</em>

or

x - 2y = 18

<u>-x        </u>   <u> -x </u>

   -2y = -x + 18

    \frac{-2y}{-2} = \frac{-1}{-2}x + \frac{18}{-9}

       y = \frac{1}{2}x - 9

<em>plot at point the y-intercept "b = -9" (0,-9).  plot the next point using the slope "m = \frac{1}{2}" from point (0,-9), count up 1 and to the right 2 (2,-8).</em>

Using intercepts will make a large graph since you have to plot (18,0) so it is best to use the slope-intercept form.



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