Ian and 3 friends decide to go on a short sailing course.

each hour costs £35 for the first person and £10 for each additional person.

how much will it cost for the 4 of them to go sailing for 2 hours?

It will cost for 4 of them to go sailing for 2 hours.

Step-by-step explanation:

Given:

Total No of friends = 4

Cost of 1 hour = £35 for the first person + £10 for each additional person =  

∴ Cost of 2 hour =

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

do have an equation or graph or

step-by-step explanation: