exam Maths Puzzle Numerical Ability

Please help write an equation for this:

x -2 -1 0 1 2
f(x) -5 -2 1 4 7

Thanks.

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exam Other Question

A 60 ft. pipe is divided into three peices. One peice is twice a long as the shortest peice, and the third peice is 4 feet less than five times the shortest peice. Find the length of the shortest peice. Please help me solve this equation: There is a square and its area is 252. The square has 9 circles in it and you need to find the area of the circles added together. Could u show me how to do the problem please A.S.A.P. Thank you