180 and 20 other words eeeee
        
             
        
        
        
Answer:
in total there are 80 subjects. I don't know what class width is though. 
Step-by-step explanation:
Look at the graph
 
        
             
        
        
        
Your answer is 110. You take 10 and divide it by 750. = 75 then you take 75. Divided 8250. = 110
        
             
        
        
        
Greg's distance is 3 times than Jed. so, 25 yards * 3 = 75 yards. And RJ ran only 0.1 times than Greg (75 yards). So, it should be 7.5 yards
        
             
        
        
        
X = 126
HOPE THIS HELPS!!!!!!!! :D