This is Pete's PPC curve for staying in touch with friends via phone vs. his weblog during one week. If Pete only wants to make calls next week and ignore his weblog, how many calls can he make to his friends?

Read off the intercept on the "Phone" axis

Step-by-step explanation:

Solution:

- The production possibility curve for peter to contact his friends via phone call vs weblog gives the combination of two ways to contact his friends with total remains constant.

- The trade-off between two ways " Pareto Optimality ". The maximum number of phone calls to contact his friends occurs when he "forgives" the method of weblog completely.

- This point on PPC is the intercept on the vertical axis ( Phone ). Read off the intercept on the "Phone" axis.    

D. When Pete writes one weblog entry he has time for six phone calls

Step-by-step explanation:

I just took the test

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

the correct answers i think are b. and d.

give me brainliest if it is correct!