BRAINLIEST URGENT
ALL THESE QUESTIONS

1) (4,-2)

2) Range: y is less than/equal to -4

Domain: all real values of x

3) Option 1

Opens downwards because a < 0

4) Option 1

Not a quadratic because no term

in x²

5) Option 2

D: all real values of x

R: y less than/equal to -4

Step-by-step explanation:

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.

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step-by-step explanation: