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No. A proportion is the relationship of one part of something to the whole thing. If X is a fifth of Y, this must be a positive value.
Two quantities x and y are said to be in direct proportion if whenever the value of x increase (or decrease), then the value of y increases (or decrease) in such a way that the ratio x/y remains constant.
The value of x + y is indeterminate. You need the values of both x and y to determine x + y.
If two variables, X and Y, are in direct proportion then Y = c*X for some fixed value c. This value, c, is the constant of proportionality for this relationship.
Revenue(x) = Price(x) * x
No. A proportion is the relationship of one part of something to the whole thing. If X is a fifth of Y, this must be a positive value.
Two quantities x and y are said to be in direct proportion if whenever the value of x increase (or decrease), then the value of y increases (or decrease) in such a way that the ratio x/y remains constant.
If the variables x and y are in direct proportion then the graph of y against x is a straight line through the origin. If the variables x and y are in inverse proportion then the graph of y against x is a rectangular hyperbola. Alternatively, the graph of y against 1/x (or 1/y against x) is a straight line through the origin.
Set up a proportion. 10/86 = x/100. I used 100 because all percentages are out of 100%. Cross multiply and solve for the value of x.
Not enough information has been given to determine the value of x
The value of x + y is indeterminate. You need the values of both x and y to determine x + y.
If two variable, X and Y are in direct variation, then the proportion of X/Y or Y/X has a constant value.
If two variables, X and Y, are in direct proportion then Y = c*X for some fixed value c. This value, c, is the constant of proportionality for this relationship.
An inverse proportion between two variables is when the value of one variable increases, the other decreases. Mathematically, this is shown as: x = k / yn where x and y are the two variables, and k and n are constants.
Not enough information has been given to determine the value of x
You need solution to determine value.
A graph is represents a function if for every value x, there is at most one value of y = f(x).