Question

A cash card has a starting value of $25. If the card is not used within the first year of its purchase, the value on the card begins to decrease by $2.50 per month.
The relationship between the number of months after the first year and the amount remaining on the card is .

The independent variable is the _____________?

The dependent variable is the ______________?

Answer 1

Answer:

• The relationship between the number of months after the first year and the amount on the remaining card is linear and inverse (which means that, when the number of montsh after the first year increases, the amount on the remaining car decreases, in a linear way).
• The independent variable is the numbers of months after the first year.
• The dependent variable is the amount on the remaining card, because this amount depends on the time it has passed since the first year (which is our independent variable!).
• If we call "y" our dependent variable, and "x" our independent variable, this relationship can be written as y=25 - 2.5x.
• If no months has passed since the first year, then x=0 and the amount in the card equals $25, while if one month has passed since the first year x=1 and y=22.5 (the amount in the card in this case is $22.5).

Answer 2

Answer:

1st one should be discrete

Step-by-step explanation: