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

FIRST OPTION: -3

Step-by-step explanation:

By definition, if two lines are perpendicular to each other, then their slopes are negative reciprocals.

In this case you can observe that that the slope of the line is and you know that the other line is perpendicular to this line. Therefore, their slopes are negative reciprocals.

This means that:

If ,then  

This matches with the first option.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175