[picture] find the slope of this line

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

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

How to simply and write the answer n a whole number