exam Maths Puzzle Numerical Ability

The budget deficit for the city of Gotham can be modeled by the equation
D = 1.2n + 13.5 where n is the number of years since 1990 and D is the deficit in millions of dollars.
correctly display the graph of the equation?

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exam Other Question
The number of sides of two regular polygons are (n-2) and (n+1). Their interior angles differ by 27 degree. Find the number of sides of each polygon.

Plese help me find the so What is the absolute value of 3/5, that is a fraction.