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

erin and susan both took their dogs for a walk. together they walked 15 miles. if erin walked3 milesless than susan, how far did susan walk with her dog? Determine which two equations represent parallel lines.
a)y = 3x - 5
b)y = -3x + 5
c)y = 3x + 3
d)y = -1/3x -5

Any help would be greatful.