Dentify each unit rate. Enter your answers in the boxes. (A) y = –2x
unit rate =

(B) y = 0.75x
unit rate =

(C) 2y = 9x
unit rate =

(D) –4y = 18x
unit rate =

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