Trish is ordering t-shirts from a website that charges a certain amount per t-shirt plus a flat rate for shipping. The cost for
a given number of t-shirts is shown in the table.
20a. Write an equation to represent the situation. (Write your answer with no spaces, all lowercase letters, and write the slope as a decimal)
20b. What does the slope mean in the context of the situation?
20c. What does the y-intercept mean in the context of the situation?
20a. Write an equation to represent the situation. (Write your answer with no spaces, all lowercase letters, and write the slope as a decimal)
20b. What does the slope mean in the context of the situation?
20c. What does the y-intercept mean in the context of the situation?
1 answer:
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If than
however any
divided by 2 is in
.
But it is not so simple.
If is odd then
is even but when even number is divided by 2, you get an odd number which is in
.
However if is even then
is odd and when we divide that by 2, you get a number like for example
which is not in
but rather inside
. There are fortunately no irrational numbers.
There is also a problem with zero, zero is neither odd nor even but still an integer. If your happens to be -1,
, and zero divided by 2 is still just 0 which is in
.
So to sum up,
If is odd and not -1, then
.
Or to put it in math .
If is even or -1, then
.
Or to put it in math .
<u>Notes</u>:
is a set of integers.
is a set of rational numbers.
means integers are a subset of rational numbers, that is, every integer is a also a fraction, however not every fraction is an integer.
Hope this helps :)