a: x+y=6
b: y=2x+4
c: 3x+y=9
d: y=-2(x-5)-6

D

Step by step explanation:

The slope of your line is negative.

The y intercept, b is 4

The slope, m is -2

Using the formula y = mx + b

Your equation should be y = -2x + 4

However, it is not clearly written like that in any answer choice. Therefore, we have to completely put all the answer choices in slope intercept form.

D is y = -2(x - 5) -6

Distribute

y = -2x + 10 - 6

y = -2x + 4

im a goose

step-by-step explanation:

gg5

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.