So is the X-axis mislabelled? Along the bottom it says "Number of elements being inserted" going from zero on the left to 2,000,000 on the right, but the title

So is the X-axis mislabelled? Along the bottom it says "Number of elements being inserted" going from zero on the left to 2,000,000 on the right, but the title says "Time to insert 2,000,000 elements". Something's very wrong somewhere.