exam Maths Puzzle Numerical Ability

I cant find a good example of how to graph a porabola in x-itercept and y-intercept form. Can you explain these to things better to me in note form pleas. It would really help me out in my math class. Thank you.

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exam Other Question

Simplify the following completly as possible

(Square root) 18x^5/y^2


Heres my work...
3x^2(square root)2x/y=2x^2/y (square root) 2x


Thanks
The diagonal measure of a rectangular computer monitor screen is 53 cm. If the screen is 45 cm wide, then how tall is it?