The range of which function includes -4?
O y= √x-5
O y= √x+5
O y= √x+5
O y=√x-5

A is the correct answer .

Start with the last two choices .

You have x+ 5 and × - 5 in the square root .

A square root can never be negative .

That means that the lowest value of y can have in the last two choices is 0 .

Now range doesn't include -4.

Now look at choice B .

sqrt (x) is at least 0.

Then you add 5 .

The range doesn't include -4.

Now look at choice A .

sqrt (x) is at lest 0 .

Now ,you subract 5 .

The lowest value y can have is -5 . That includes -4.

Choice A is the answer .

y will be at least 5

Hope it works out !

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

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