Emma runs a farm stand that sells apples and blueberries. Each pound of apples sells
for $3 and each pound of blueberries sells for $1.25. Emma made $58.50 from selling
a total of 30 pounds of apples and blueberries. Write a system of equations that could
be used to determine the number of pounds of apples sold and the number of pounds
of blueberries sold. Define the variables that you use to write the system.

a framing bias

step-by-step explanation:

rodrigo is subject to a framing bias i believe.

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