Ido not know if i am correct or not. give an explanation of how you solved it.

You are absolutely right, excellent logic. Basically, k = number you have to multiply the numbers from x axis(earned) to get numbers from y axis(paid), so you simply pick one point which you know the coordinated and then divide the values of y by the value of x, for example : k = y/x = 25/10 = 50/20 = 75/30 = 87,50/35 = 2,5 . It doesn't matter which point you pick, it's always gonna be the same in this case. Hope this helps.

the third picture

step-by-step explanation:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b