exam Maths Puzzle Numerical Ability

What is the equation of the asympote of the function, y=3(1/4)(^x)-2? I think the answer is y=-2 but I don't understand really .

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exam Other Question

The area of a triangle is 13.5 square meters.Find the base and height of the rectangle if its height is 6 meters greater than its base. Use an equation and the formula: area of a triangle =0.5(base)(height)

I have no idea what to do ,Please help me!
I am not good at all with word problems and need some help