Yes.
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If the graph is a straight line through the origin, sloping upwards to the right, then it is a proportional linear relationship.
The graph of a linear proportion will be a straight line passing through the origin. The equation will have the form y = mx, also written as y = kx.
The axes of coordinate planes intersect at the point of origin.
The origin is where the two intersect. This is where both number lines are 0.
The graph of a relationship in which two variables are in direct proportion is a straight line through the origin, whose slope = the rate of change = the constant of proportionality.