The relationship between the number of $4 lunches you buy with a $100 school lunch card and the money remaining in the card

Answers

You can divide 100 by 4 to find out how many lunches you can buy
or multiply 4 by the number of lunches you have had
100 - that number^=money remaining
You can buy 25 lunches and there will be no money left on the card
To set up an equation for this you must know what needs to be on the other side of the equals sign or what the answer is supposed to be. In this case, we know the answer should be the money remaining on the card. Since there is no number value for this, you must pick a variable to represent it. I am going to use variable R. So, since we know that you start with 100 dollars, and lose 4 dollars for each lunch, we can tell that there will be subtraction taking place. We also do not know how many lunches have been bought so we need a variable for that too. I will use variable x. That will leave you with an equation of:
R = 100 - 4x

x= number of lunches bought
R= remaining money on the lunch card

Hope this helps!
If the cost of the school lunch does not change it would be a linear equation, therefor, you would connect the dots.
Every time you buy a $4 lunch, $4 is subtracted from the remaining balance on your school lunch card.  If x represents the # of lunches you've bought, then

the $ remaining on the card = $100 - ($4)x.  If x=0 (no lunches), you have $100 on the card; if x =25, you have 0 remaining.
A solid line, because each lunch cost the same, and the price does not differ from lunch to lunch. So, 100 - 4 = 96  |  96 - 4 = 92, etc.

Well - I mean. If every lunch costs $4 that means that the relationship should be linear.


You used to be able to draw graphs. But plot it out.

The relationship will be a solid line.

Step-by-step explanation:

The relationship between the number of $4 lunches you buy with a $100 school lunch card and the money remaining on the card.

The relationship will be a solid line as it is a linear and common slope. Each time you buy lunch, the amount in the card will decrease by $4.

Let the number of lunches you buy be = x

Let the amount remaining in the card be = y

So, equation forms:

y=100-4x

When you buy 1 lunch, or x = 1

y=100-4(1)=96

When x = 2

y=100-4(2)=92

When x = 3

y=100-4(3)=88

We can see that the decrease is gradual and same.

You can also see the graph attached that a straight line is formed.


The relationship between the number of $4 lunches you buy with a $100 school lunch card and the mone
100 divided by 4 = 25
You can get 25 lunches with no money remaining.


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