An airline charges £300 for a flight of 2000 km and £700 for a flight of 4000 km. (a) Plot these points with distance on the horizontal axis and cost on the vertical axis. (b) Assuming a linear model estimate (i) the cost of a flight of 3200 km. (ii) the distance travelled on a flight costing £400.
Graphs, equations and logarithms problems 1. Three companies can supply a university with some mathematical software. Each company has a different pricing structure: Company 1 provides a site licence which costs £130,000 and can be used by anyone at the university. Company 2 charges £1,000 per user. Company 3 charges a fixed amount of £40,000 […]