Answer:
f(x) = 60-2x
Step-by-step explanation:
Suppose that f(x) = y is a happiness function. It is a function of the number of hours you spend on Instagram per day. That means that the output of the function will be a "happiness score",i.e. the value between 0 and 100, and the variable <em>x </em>will be an output value, the hours spent on Instagram daily.
We know that if we spend 0 hours on Instagram per day the happiness score will be 60, which means that:
f(0) = 60
If we spend 1 hour per day on Instagram our level of happiness will be decreased by 2, i.e. 60-2 = 58. Therefore,
f(1) = 58
If we spend 2 hours on Instagram per day our level of happiness will be decreased even more, i.e. 58-2 = 56. Therefore,
f(2) = 56
Notice that 56 = 60-4 = 60-2*2
If we spend 3 hours on Instagram per day our level of happiness will be decreased even more, i.e. 56-2 = 54. Therefore,
f(3) = 54
Notice that 54 = 60-6 = 60-3*2
Now we can see the pattern from which the level of happiness can be calculated. It is 60 decreased by the number of hours multiplied by 2.
Hence, the "happiness function" is:
f(x) = 60-x*2 = 60-2x, where x is a number of hours spent on Instagram.
