3 quick math questions :) help

The answer for the first one is (-2,-3) because if you put a point there, then it would make a right triangle and, if ou take the x term from the higher point and the y term from the lower point and put them togeteher, then you get (-2,-3)

if you mean directly proportional where x/y=k where is x goes up, y goes up as well so try them out

first one: x/y=k 1/11=k  does 3/23=k as well? no so this is not proportional

second one: x/y=k 1/2=k does 3/-10=k as well? no, so this is not proportional

third one: x/y=k  1/-6=k does 3/-22=k asl well? no, so this is not proportional

fourth one: x/y=k  1/-8=k does 3/-24=k as well? yes, so this is the proportiona one

subsitute
if x=1 and y=7

try the first
7=1+7
false so the first one doesn't work

try the second
7=1-7
false, so the second one doesnt' work

third
7=1/7
false so the third one doesn't work either

try the fourth
7=(7)(1)
7=7
true so this is the naswer
7=7 tue

The first one should be (5, 5) or (-2, -3). This will create a 90 degree angle and giving us a right triangle. Since (-2, -3) is the only one in the options, that is the answer.

For the 2nd one, we can just divide all the values and see which table gives us the same amount for all the values.

1 / -11 = -0.0909090909
3 / -23 = -0.130434783

These aren't the same so Option A is incorrect.

The correct answer is Option D, because all of them equal -0.125.

For the last one,

When y increases by 1, x increases by 7.

Therefore the equation is y = x + 7.

The answer simplified would be. -6300x