There are many ways that the number 3 can be written as a function of the number 18. A function of any number (x) is often called f(x).
Let's say that f(x)=k.
So, in this case, x=18 and k=3. In other words, f(18)=3.
Now, you have to think of an equation that could relate the two numbers. For example, the easiest way to show how 3 is related to 18 is to show that 3 times 6 equals 18. Therefore, you could write that 3 = 18/6. And this equation proves that the number 3 is a function of the number 18.
The normal way of showing that y is a function of x is to write y = f(x).
MATH 1003?
The equation x=c where c is a constant is the equation of a vertical line. It can't be a function but it is linear so the answer is no. For example, the vertical line produced by the linear equation x = 3 does not represent a function. We cannot write this equation so that y is a function of x because the only x-value is 3 and this "maps" to every real-number y.
you have to solve y to get the answer
you add 1+1= 25 simple ;)
Cost = Fixed + (variable x units)
let's take an arbitrary equation, or maybe two or three so you can see how to do it. y=2x+6 t=z^2+3z w=r^4+pi Ok, the first equation, you pick the x and put it in the equation and multiply it by 2 then add 6. If you do all this you get y. So y is really a function of x or function of x is written f(x) is the way we say this So to write the equation in function notation we write f(x)=2x+6 Same thing for the second equation z is what we put in. It is the independent variable. So t is just a function of z we write f(z)=z^2+3z Last equation is the same f(r)=r^4+pi
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Y = X2 ===== This is a parabolic function because it passes the vertical line test. ( you should know what that test is )
A vertical line has the equation [ x = a number ]. A horizontal line has the equation [ y = a number ].
slope 5/6 through (-18,6)
MgCO3 --(heat)--->MgO+CO2