book Maths Puzzle Numerical Ability

Can you please let me know if I am correct.

(x-3)squared (y-2)squared
------------ + ------------- = 1
9 4

is this an ellipse?

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book Other Question

The sum of 5 and a negative integer is greater than -4 and less than 0. How many possible negative intergers satisfy the information? A roast was cooked at 325 �F in the oven for 4 hours. The internal temperature rose from 32 �F to 145 �F. What was the average rise in temperature per hour?