exam Maths Puzzle Numerical Ability

10. Use the following table to answer the question.
Population of Europe by Age Groups
Population (in thousands)
1950 1970 1995
Age 0-14 143,175 166,367 139,464
Age

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Gary and Lynn found that the larger number was 2 greater than 4 times the smaller number. Also,the larger number was 6 less than 8 times the smaller number. What were the two numbers? Determine the slope of the line that passes through each pair of points.
1.(5,1) and (2,7)

2.(5,3)and(-2,3)

3.(-1/2,-2)and(-3/2,1)

4.(2,-4)and(2,6)