straight line
If it is a straight line through the origin then it represents a direct proportion.
A kind of weird line that is straight.
Unless it is a direct proportion, the straight line does not have to start from zero.
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.
straight line
If it is a straight line through the origin then it represents a direct proportion.
A kind of weird line that is straight.
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
This graph states, therefore, that A is directly proportional to B. It also states that ... thus showing that this straight line through the origin represents a direct proportion. ... what you are talking about, because there are other types of proportions.
Unless it is a direct proportion, the straight line does not have to start from zero.
It represents a direct proportion and whose graph is a straight line through the origin.
straight line
Straight line.
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.
A straight line, through the origin, sloping up from left to right. The gradient of the graph will be the constant of proportionality.
Which type of line shows a direct proportion