A line of best fit gives a prediction, which may differ from a measured dot. If a graph gives height and asks for time, start on the axis of the given value, cross to the fitted line, then read the requested axis. Don't switch the axes or use a nearby dot instead of the line.
Hints
- Hint 1
The vertical axis records candle height, so centimeters is where you begin, even though the question asks for time. Which part of the graph gives a prediction rather than an individual measurement?
- Hint 2
A fitted line follows the overall trend, while each dot is one actual measurement. From the line at the given height, move straight down to the horizontal axis. What time does that position show?
Step-by-step
Read the fitted line
Step 1Find the predicted height on the line
No Desmos needed. Read the prediction from the drawn line. Each dot is a measured candle height; the line of best fit gives the prediction. Start at centimeters on the vertical -axis and trace across until you meet the line.
- Step 2
Read the corresponding time
From where you met the line, trace straight down to the horizontal -axis. You land at , so the predicted time since the candle was lit is minutes. Choice B.