Can someone please tell me the answer to this question ASAP! Thank you!!

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

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