2 For each context in a-d below: i Identify the independent and dependent variables and their units, where appropriate. ii Determine whether a linear function can be used to model the relationship...

I need help with all 2 please :)

Extracted text: 2 For each context in a-d below: i Identify the independent and dependent variables and their units, where appropriate. ii Determine whether a linear function can be used to model the relationship between the two variables, and if so, state the rate of change. a Parking at an airport is charged at $18 for the first hour parked and $12.50 for each subsequent hour. b The population of fish in a lake declines by 7% each year. c Italy charges a value-added tax (VAT) of 22% on all purchases. The amount of tax you pay depends on the amount of your purchase (in euros). d Sal's Ski Resort notices the following trend in sales of daily passes: Daily high temperature ("c) Number of daily -4 -1 3 7. 430 406 374 342 passes sold