I'm going to go with C. The inequality isn't greater than OR EQUAL TO which marks out B and D. The inequality is showing that it is greater than -21 meaning that the shaded area should be towards the positive which in turn marks out A.
Since there isn't a line under the sign, it will be a dotted line on the graph. And since it is greater than, the right side of the line will be shaded. Therefore, the answer is C
26.5 miles in 4 hours is stating 26.5 miles per 4 miles. To find out how far it is in one mile, you can either make a proportion or divide 26.5 miles per mile by 4. Division: 26.5 miles per 4 hours = 6.625 mph Proportions: In one hour, Ashleigh traveled 6.625 miles in 1 hour.