For a school field trip, there must be 1 adult to accompany 18 students, 5 adults to accompany 90 students, and 7 adults to accompany 126 students. Show that the relationship between the number of adults and the number of students is a proportional relationship. Then enter an equation for the relationship. Let a represent the number of adults and s represent the number of students in your equation. Number of students1890126
Number of adults157

Each rate is equal to
1 adult
18
students
. The relationship
is
proportional.

The equation is a =

its the 3rd one because 3-4+4=0

Step-by-step explanation:

x=6 and x=3

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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