exam Maths Puzzle Numerical Ability

How do you figure out the equation of a line modeled by the table like:
x y
0 -5
1 -1
2 3
3 7

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exam Other Question

how do you solve this equation....

"write the equation in a standard form for a line containing the point (2,#) and parellel to each o the following lines"

(p.s.) just one
Over the next 25 years, the number of jobs in the San Diego metropolitan are (in thousands) is prjected to be given by y=55.357x + 1654.29, Where x=2 corresponds to 2002*.
A.