exam Maths Puzzle Numerical Ability

What is the slope of the line with the equation 2x+3y+6=0??
A. (-6,1) B. (-4,-1) C. (-4,3) D. (-2,1) E. (8,1)

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my question is what i did wrong on this problem?

y=x-4
4x+y=26 How do you find the slope of the line containing the points (-1, -1/5) and (2/3, 3/4)? I am confused about this because I do not understand how to find the slope when the points contain fractions and/or decimals.