exam Maths Puzzle Numerical Ability

y=1/2x-3.What is the slope?
I got an answer of -3
Is this correct?
Thank You!

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exam Other Question

How many different automobile license plates can be made if each plate has a letter followed by three digits? How many ounces of pure water must be added to 80 oz of a 9% salt solution to make a 6% salt solution?

A.
120 oz

B.
60 oz

C.
50 oz

D.
40 oz