Question

Gloria has a lunch account in the school cafeteria. The balance, f(x), in her account can be represented by the function f(x) = –1.50x + 40, where x is the number of meals purchased. Suppose –1.50 changed to –2.75. What does this mean in the context of the problem?

Answer 1

What do you think it means?

Answer 2

i think it means that your suppose to replace -1.50 with -2.75

Answer 3

and how the balance is going to increase or decrease

Answer 4

Okay..

Answer 5

So is the balance increasing or decreasing?

Answer 6

Changing –1.50 to –2.75 means her initial balance has decreased.
Changing –1.50 to –2.75 means her initial balance has increased.
Changing –1.50 to –2.75 means the price per meal has decreased.
Changing –1.50 to –2.75 means the price per meal has increased.

Answer 7

If its going from -1.50 to -2.75 has in increased or decreased?

Answer 8

it decreased

Answer 9

I started off asking the wrongs questions i'm sorry. What do you think 1.50 represents in this equation?

Answer 10

her balance on her account

Answer 11

No. What is the constant in the equation?

Answer 12

40

Answer 13

Okay, look. Here's the only way i know how to explain it.
-1.50 is the cost per meal x is the variable used to represent the # of meals Gloria eats. So if -1.50 changes to -2.75, what does that say about the equation?

Answer 14

We already know that -1.50 is MORE THAN -2.75... What is happening to the cost per meal?

Answer 15

it decreases

Answer 16

Okay so what is the answer?

Answer 17

Changing –1.50 to –2.75 means the price per meal has decreased.

Answer 18

am i right

Answer 19

No. If the price of the meal was 1.50 you're spending one fifty therefore if the price goes from 2.75 then you're paying MORE.

Answer 20

From 1.50-2.75

Answer 21

It's D.

Answer 22

ohhhhhh

Answer 23

Yes.

Answer 24

thank you sooo much sorry for not getting it sooner ill give you a medal for helping me

Answer 25

Correct on test.