book Maths Puzzle Numerical Ability

Does the inside of the absolute value change to a negative if it is positive, or positive if it is a negative, or does the outside of the absolute value change to a negitive if it

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A line passes through the point (-1,3) has a slope of 2. Find another point on the line. This is a multiple choice A.(-3,2) B. (1,5) C. (0, 5) D.(1,4) Neil sets the prices in the Hardware To Go store. His research shows than an increase of 10 cent in the price of a package of batteries causes a drop in sales of 10 packages per da