book Maths Puzzle Numerical Ability

I have been given a T-Chart and hve to write the function, situation,X intercept and Y intercept, then graph.
X Y

-4 21
-1
1 1
2
-11
6
-31

I can

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book Other Question

How many yards of felt will I need total to make 8 slipcovers that are 43 1/2 inches long and 19 inches wide? 6. If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
a. 3 b. 9 c. 5 d. 4 e. none
The answer on the answer key is D, but I have no clue how to get the same. Please help!