The slope of a line is 1/3. what is the slope of a line perpendicular to this line? /3 c.)1/3 d.)3

A perpendicular line has a negative reciprocal of a given line.

The given slope is 1/3, the reciprocal of this would be 3/1, which simplifies to 3.

The negative of 3 is -3.

The answer is a) -3.

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graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.