exam Maths Puzzle Numerical Ability

evaluating indices (216/27) to the power of -2/3

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exam Other Question

Cost of car depends on km driven. Write lineqr equation expressing dollars per month as function of km per month if given $158 month if drive 300 km and $230 a month if drive 1500 km. Predict cost for 1000 ad 2000 km driven a month. I need to graph the following equations. Identify the vertex, interceps and equations of the axis. Thank You
y=-x^2+2