10.use the slope formula to find the slope of a line with ordered pairs (2,-1) and (4,+2)

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

I’m really confused and need your assist me with this question i’ve never been taught