A scatterplot pairs two measurements in each dot. If a question asks for a point that appears, find a dot's position on the horizontal axis, then read its height on the vertical axis. Both coordinates must come from the same dot. Don't estimate a point from the overall pattern or pair the height of one dot with the position of another.
Hints
- Hint 1
In an ordered pair , the first number gives the horizontal position. The horizontal axis measures minutes used here, so start with the first number of a candidate pair. Is there a dot directly above it?
- Hint 2
The vertical axis measures battery remaining. Once you find a dot by its horizontal position, read the height of that same dot. What percentage does its height show?
Step-by-step
Read one dot from the scatterplot
Step 1Locate the dot by its minutes
No Desmos needed. Read the dot directly from the scatterplot. In an ordered pair , the first number gives the horizontal position. The horizontal axis measures minutes used, so look straight up from minutes to find the plotted dot there.
- Step 2
Read the same dot's battery percentage
The vertical axis measures battery remaining, so trace that same dot left. Its height is . The dot is , meaning the flashlight had battery remaining after minutes. Choice A.