3) People with acrophobia (fear of heights) sometimes enroll in therapy sessions to help them overcome this fear. Typically, seven or eight therapy sessions are needed before improvement is
noticed. A study was conducted to determine whether the drug D-cycloserine, used in combination
with fewer therapy sessions, would help people with acrophobia overcome this fear. Each of 27
people who participated in the study received a pill before each of two therapy sessions. Seventeen
of the 27 people were randomly assigned to receive a D-cycloserine pill, and the remaining 10
people received a placebo. Three months after the administration of the pills and the two therapy
sessions 61% of those receiving D-cycloserine pill improved their acrophobia, while 33% of those
in the placebo group improved their acrophobia.
Vanables ("What-
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$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1