From the graph, read the step count for each day of the week.
Distance per day (km) = Steps × 0.75 / 1000.
Total distance = Sum of all 7 daily distances.
Target: 7 km = 7000 m / 0.75 m per step = about 9333 steps.
Find which day's step count is closest to 9333.
Final Answer: Read from the graph and compute.