If it is a straight line through the origin then it represents a direct proportion.
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.
Unless it is a direct proportion, the straight line does not have to start from zero.
If it is a straight line through the origin then it represents a direct proportion.
straight line
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.
It represents a direct proportion and whose graph is a straight line through the origin.
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.
Unless it is a direct proportion, the straight line does not have to start from zero.
straight line
When quantities are related this way we say that they are in direct proportion.
Straight line.
Direct proportionality. Their graph would be a straight line through the origin, with the slope equal to the ratio.