What unit is used on the horizontal axis?
What time is shown on the stopwatch below?

What time is shown on the stopwatch below?

What time is shown on the stopwatch below?

What is the title of the graph below?
What is the scaling on the vertical axis of the graph below?
What is the scaling on the horizontal axis of the graph below?
What is the interval on the horizontal axis of the graph below?
What is the variable on the vertical axis of the graph below?
What is unit used on the vertical axis of the graph below?
What the trend shown on the graph below?
What unit is used on the vertical axis?
What kind of correlation is shown between the lead content of the water and the time the water had been running when the sample was taken?