Anyone good at math?

I have been trying to figure it out all day and I just can't. I have emailed a math tutor, I'm still waiting on his response. My professor is going to be conducting an online chat tonight at 10:30 and I plan on being there for that, so don't tell me to do my own homework because I'm trying, I just don't get it! Here's the problem:


I am creating a chart to show a company's revenue. The formula is


Total Costs=Variable Costs + Fixed Costs


C(x)=mx+y


where x represents the number of items produced, m represents the cost to produce each item, and y represents the fixed costs.


These are the graphs I have to create:


Quadratic


Polynomial


Rational


Exponential and


Logarithm.


I could figure out the graphs using Excel but I need the equations. Please don't try to explain it to me using a bunch of math lingo and mumbo jumbo because I don't understand it at all. Just give me the equations.

Anyone good at math?
Your total cost equation is linear (a line), it is also a polynomial.





Quadratic means polynomial of degree 2. You should see an x squared in your equation. You could use x*C(x). I do not know what the interpretation for that will be.





Rational means a quotient of polynomials. Say total cost per unit. Divide C(x) by x.





How can you have exponential and logarithmic in costs??


Change your C(x) to e^(mx) + y???


or ln(mx) + y??





d:
Reply:If the formula C(x) = mx + y remains unchanged and you are simply graphing it with different coordinate systems,


(changing C(x) = mx + y to C(x) = mx + b so I can use y for dependent variable)


Quadratic


y = √(mx + b)


Polynomial


y = (mx + b)^(1/n)


where n is the degree of the polynomial desired.


Rational


-- no clue --


Exponential


y = ln(mx + b)


and


Logarithmic


y = e^(mx + b)





If you are finding different equations,


Quadratic


C(x) = a + bx + cx^2


Polynomial


C(x) = a + bx + cx^2 + . . + mx^n


Rational


-- still no clue, unless it's


C(x) = a + b/x


Exponential


C(x) = a + be^cx


Logarithmic


C(x) = a + bln(x) or


C(x) = a + bln(x + c)
Reply:Still use Excel, Chart, Add trend line, select your curve, Options, check Display equation on chart.

carnation