Toby goes on holiday in Geneva, Toby sees a watch costing 193.75 CHF (Swiss francs). In Manchester the watch costs £145 , given that £1= 1.55 CHF Which country was the watch cheaper in?

im not sure what this means: mc011-7.jpg

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)