Answer:
3.) -x+4
4.)3/4x+3
5.)-3/5(x) -3
6.)-2x + 5
these are the "Slope intercept" forms of 3,4,5 and 6 you can learn to graph them as its hard for me to explain.
Step-by-step explanation:
3.) x+y=4, we want to write this in terms of y, so lets subtract x from both sides
y = -x+4 ----> this is in "slope intercept form" you can learn about this on "khan academy" as well.
4.) 3x-4y=-12 again we write in terms of y, subtract 3x from both sides.
-4y = -3x -12 then since we want y separately, we divide both sides by -4
y = 3/4(x) + 3 ------> if you didnt understand fully what i did to get to that, i divided everything by -4, and hopefully you know that a minus and a minus (multiplied or divided) will give a positive number.
5.) 3x+5y=-15 again we rewrite for y
5y = -3x - 15
y = -3/5(x) -3
6.) 2x+y = 5
y = -2x +5
the form in which y = whatever, is considered "slope-intercept form"
I cant really graph the points for you but watch this video, its very informative: https://www.khanacademy.org/math/algebra/two-var-linear-equations/graphing-slope-intercept-equations/v/graphing-a-line-in-slope-intercept-form
