The picture shows the graphs of the functions expressed by a formula of the following type: y = kx + b. Determine the signs of k and b for each graph.

First graph: k is_, b is _
Second graph: k is_, b is _

I will award Brainiest to the first one who gets it correct! :)

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.