algebra equations

Question

plan A cost $30 and 0.10 cent per text and Plan B cost $90. per month unlimited and plan C cost $50 dollars per month and 5 cents per text . All plans has unlmited calling.

what is the independent variable and the dependent variable? also what is the rewriten equation for plan A , paln B and Plan C .

T,text messages 0,100,200,300,400,500,600,700,800,900, writtten in coloum eg 0 blank

100 Blank

next colum has C total cost and i need to fill in the blank opposite each number 200 Blank

Answer 1

Okay, let's break this down. An independent variable is one that is free from change by other things. An easy way to remember it is to think of Independence Day, when the United States became a separate country that could make its own rules. A dependent variable is the opposite of that.

So in this situation, the initial cost is the independent variable because it's the same no matter how many calls you make. The amount per text is dependent because it "depends" on how many texts you send.

So, the basic equation is Plan=(cost)+(cost per text)X(how many texts you send).

For example, Plan A=30+0.10T T=number of texts.

Once you have the two numbers you know in your equation, you can put the number of texts where the T is currently. Take number of texts, multiply by cost per text, then add it to the larger cost.

I hope this helps. If you have any more questions, please send me a message.