The line graph shows the number of muffins sold in a week.

1. How many more muffins were sold on Wednesday than on Friday?
2. On which day was the number of muffins sold four times as many as the number of muffins sold on Thursday? Give your answer in this format. (Eg Mon)

(a)
Number of muffins sold on Monday = 120
Number of muffins sold on Tuesday = 10
Number of muffins sold on Wednesday = 140
Number of muffins sold on Thursday = 80
Number of muffins sold on Friday = 40
Number of muffins sold on Saturday = 20
Number of muffins sold on Sunday = 320

Number of more muffins sold on Wednesday than on Friday
= 140 - 40
= 100

(b)
Number of muffins sold on Thursday = 80

Number of muffins sold in a day to be four times as many as the number of muffins sold on Thursday
= 4 x 80 
= 320

On Sunday, the number of muffins sold was four times as many as the number of muffins sold on Thursday.

Answer(s): (a) 100; (b) Sun