You race your bike at a speed of 20 miles per hour. Your friend races at a speed of 25 miles per hour. Suppose your friend gives you a 30 mile head start.
Sit back and think about it logically. You’re going to make a simple graph, in intervals of 5. Line a is you. It starts on Y-axis 30 (because of the 30 mile head start) and draw your line for every hour (X-axis) your line with increase by 20 units. Then for your friend’s line, it will start on 0 and then increase by 25 units for every hour. Using this new graph, you will answer all the other questions. Got it?