Respuesta :

at 5 hours the get $60 then at 3 hours they get $50 therefore they are paid $5 per hour
i believe you just need to calculate the slope. 

get two points from the graph, i will pick (0,35) and (5,60)

now find slope =5 

(60-35)/(5-0)= 25/5 = $5 per hour

hope that helps and if right?