Select the true items related to elasticity and generalised cost. Select only the four correct answers.

Generalised cost denotes the summation of different components of user cost, all expressed in time terms.

Elasticity is a qualitative measure used in transport economics to describe the strength of a causal relationship between two variables

Cross-elasticity can be used to determine the change in demand of a transport mode due to change of a variable of interest affecting another mode.

Elasticity in transport planning can be interpreted as the percentage change in the number of ridership in response to a one per cent change of a variable of interest.

Elasticity in transport planning can be interpreted as the percentage change in the variable of interest in response to one per cent change of the number of ridership.

Generalised cost denotes the summation of different components of user cost, all expressed in dollar terms.

Elasticity is a quantitative measure used in transport economics to describe the strength of a causal relationship between two variables.

Cross-elasticity can be used to determine the change in demand of a transport mode due to change of a variable of interest affecting the same mode.