exam Maths Puzzle Numerical Ability

I am stuck on correct answer for:

If x is directly proportional to y and x = 3 when y = 8, what is the value of x when y = 2


I am not using a specific book. I am just practicing...

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exam Other Question

Find f (-1/3). f(x)=18x2-12x-3 Please show me the steps to solve this.

graph the region decribed by the inequality

-4>=2y

Thanks so much