Graphs of Proportional Relationships Flashcards

A relationship where two quantities increase or decrease at the same rate, forming a straight line through the origin on a graph.

A straight line that passes through the origin (0, 0).

The gradient represents the constant of proportionality (k) in the relationship y = kx.

y = kx, where k is the constant of proportionality.

The value of k in the equation y = kx, which represents the rate of change between the two variables.

Check if the graph is a straight line passing through the origin.

The gradient of the line shows how much y changes for a unit change in x.

The ratio y/x is constant for all pairs of values in a proportional relationship.

Distance travelled is proportional to time when travelling at a constant speed.

A graph that does not pass through the origin or is not a straight line is not proportional.