Greta, who is in seventh grade, asks her classmates pete, rob, mark, maria, and sharon about their favorite books. four of the five say their favorite book is the adventures of huckleberry finn. from this data, greta concludes that most seventh-grade students like this book.

Step-by-step explanation:

Greta’s sample is Biased . The generalization made from the sample is Not Valid .

This is because Greta only asked HER classmates and not from other classes. Besides, that sample if too small for a population as big as most 7th graders. (I got this right in my test from Edmentum). Hope I Helped!!! :)

john earns $14.00 for two hours of work.

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