Sally's Plant Growth Analysis

This lesson focuses on using coordinate grids to show mathematical relationships. Students learn to plot points on a grid, understand the role of independent and dependent variables, and use graphs to solve problems. The lesson uses Sally's plant growth as an example, teaching students to set up a graph, plot data points, and predict missing values. The lesson concludes with extending the graph to solve further problems.

What is the main focus of lesson 164?

• Using coordinate grids to show mathematical relationships

• Understanding algebraic expressions

• Studying geometric shapes

• Learning about fractions

How are the X and Y axes similar to number lines?

• They are both vertical

• They both show numbers in order at equal intervals

• They both start at zero

• They both have negative numbers

In Sally's plant growth problem, which variable is placed on the X-axis?

• Height of the plant

• Day

• Type of plant

• Number of leaves

What is the dependent variable in Sally's plant growth graph?

• Day

• Amount of sunlight

• Height in centimeters

• Type of soil

What title is suggested for the graph showing Sally's plant growth?

• Sally's Garden

• Plant Growth Over Time

• Height of Sally's Plant

• Growth of a Tree

What is the predicted height of Sally's plant on day 4?

• 6 cm

• 8 cm

• 10 cm

• 12 cm

What is the purpose of drawing a straight line through the plotted points?

• To highlight the X-axis

• To separate different data sets

• To identify patterns and solve additional problems

• To make the graph look neat

According to the graph, how tall will Sally's plant be on day 10?

• 22 cm

• 20 cm

• 18 cm

• 24 cm

What is the challenge problem presented at the end of the lesson?

• Predicting the plant's height on day 20

• Finding the height of the plant on day 15

• Determining when the plant will be 30 cm tall

• Calculating the average growth rate