A graph represents a function if and only if every input generates a single output.
Usually x (independent) variable is the input and y (dependent variable) is the output.
When the data on the graph is continuous,it does make sense to connect the points on the graph of 2 related variables.
Go to the Wolfram Alpha site and type the following in the input box: |x|
Input/output table, description in words, Equation, or some type of graph
hyperbola
hyperbola
When quantities are related this way we say that they are in direct proportion.
The graph of the function y(x) = 1/x is a hyperbola.
a circle graph. is the answer
If it is a straight line through the origin then it represents a direct proportion.
A kind of weird line that is straight.
pie chart
straight line
orginize
Assuming both the scales on the graph are linear (that is to say that the numbers go up evenly) then YES, a graph which shows direct proportion must be a straight line. It must also pass through the origin (0,0). A straight line which does not pass through the origin is NOT showing direct proportion. Duncan
A circle graph