exam Maths Puzzle Numerical Ability

How do you solve these two problems with equations of functions and relations?
2x+2/0.5=

0.4(0.5)squared-1.2.

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exam Other Question

I do not understand this at all. Can you please help me with this one?

Using the index of a series as the domain and the value of the series as the range, is a series a functi write the equation of each line in standard form. Passes through (-6,2) and (-2, 0)