Miguel runs 4 miles in 30 minutes. At the same rate, how many minutes would he take to run 10 miles?
2 answers:
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First we need to find the slope of line k. Using the slope formula, we fill in accordingly: 
. The slope is -3/2. The slope of a line that is perpendicular to line k will have the opposite sign (so, positive) and will be the reciprocal of the line k's slope (so, 2/3). You could also say, more "mathematically legal", that the product of the slopes of perpendicular lines is -1, but it's easier to just say that they are opposite reciprocals. The slope you're looking for is 2/3. Choice 3 above.
Step-by-step explanation:
y iterscept is -4 slope 2/3 rise over run
