The graph shows the cost, $c, of travelling a distance,  km, with Saanvi’s Taxis.
 km, with Saanvi’s Taxis.
 
ia) Write down the cost of a 4km journey.
$ ................................................. [1]
 
ib) Complete this statement.
 
Saanvi’s Taxis cost $ ........................ for each kilometre travelled.
[1]
 
ic)  Find the equation of the line.
 
c = ................................................. [1]
 
Krishna’s Taxis cost $5 to hire plus $2 for each kilometre ravelled.
 
iia) Show that the cost of a 4km journey with Krishna’s Taxis is $13.
[1]
 
iib) Find an equation for the cost, $c, of travelling d kilometres with Krishna’s Taxis.
 
c = ................................................. [2]
 
iic) On the grid, draw a line to show the cost of travelling with Krishna’s Taxis.
[2]
iid) Mrs Singh wants to hire a taxi.
She says that Saanvi’s Taxis are always cheaper than Krishna’s Taxis.
Is Mrs Singh correct? 
Give a reason for your answer. Use your graph to help you.
[1]