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

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

(a)
Number of sandwiches sold on Monday = 60
Number of sandwiches sold on Tuesday = 150
Number of sandwiches sold on Wednesday = 180
Number of sandwiches sold on Thursday = 10
Number of sandwiches sold on Friday = 50
Number of sandwiches sold on Saturday = 190
Number of sandwiches sold on Sunday = 20

Number of more sandwiches sold on Wednesday than on Friday
= 180 - 50
= 130

(b)
Number of sandwiches sold on Thursday = 10

Number of sandwiches sold in a day to be twice as many as the number of sandwiches sold on Thursday
= 2 x 10 
= 20

On Sunday, the number of sandwiches sold was twice as many as the number of sandwiches sold on Thursday.

Answer(s): (a) 130; (b) Sun