i need helppp, (don’t know if i ignore the minus for step two which is adding up the numbers from the shape)

Can some one me with this math problem?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics