Analyzing Data and Drawing Conclusions Answers

You can control accuracy by choosing the appropriate tool or instrument and using it carefully. How could the students in the following questions improve their accuracy?Tyrrell wanted to measure the growth of tomato plants in response to different types of fertilizer. Which tool would be most accurate?calipers✔ metric rulermeter stick

Which axis should be used to represent the dependent variable? X x-axis✔ y-axis

What type of graph should be created? bar graph✔ line graph

Marcy uses pH strips to measure the pH of water samples from several ponds in the city park. Which reason explains why using a pH meter would improve the accuracy of her data?

Rajesh designed an experiment to test the effect of fertilizer on plant growth. The table on the right shows the data he collected. Which changes should Rajesh make to his experiment to improve the validity of the data? Check all that apply.

Which variable is the dependent variable? X time✔ carbon dioxide reproduced

Control✔ LiquidX Slow-Release

about 0.9 cmabout 1.4 cm✔ about 2.1 cm

✔ They grew more during week 1 than any other week.They grew the most between weeks 1 and 3.They grew the least between weeks 3 and 4.Their average growth rate was the same for all 4 weeks.