The slope of the line below is -4. which of the following is the point-slope form of the line

y - b = -4(x - a)

Step-by-step explanation:

If the line passes through (a, b), then the point-slope form of the equation of the line is y - b = -4(x - a).   Where's the line you mention?

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.

i'm sure goog can you get that answer