Is 6% of a pound weigh more than an ounce

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5