Weekly Math Poll – Fish Tank
The first task presents a word problem with two data points, one where the tank has a full 10 gallons and one where it has 8 gallons a month later.
Some students will see the rate of -2 gallons per month and be able to translate that to the term -2x. Other students may struggle with how to get started. We encourage you to suggest they use the scratch pad to create a table of values for months and gallons. Then students can extrapolate what would happen after 2 months, 3 months, ect. If you think most students will need this support, you can go to scratchpad settings and add the table into the scratchpad so it will show up in every students’ scratch pad.
The second task asks students to fill in the blanks for the intercepts of y=-2x+10. If students are struggling to compute the intercepts analytically, you can have them use the scratch pad to create a table of values. When there is an expression on the right side header of the table, the table will auto compute the value of that expression. You can create a table that is placed in every student’s scratch pad so they can test points to see what -2x-10 equals for different values of x. In the example below, the values of -2x+10 are automatically computed based on the values of x that are entered.
Students can also use the scratch pad to write out how they compute the x and y intercepts analytically. This can be a great reminder for students about showing their work.
If students need more support, you can save the expression, written out with a header for y-intercept and x-intercept, directly on to their scratchpad. This can be a helpful reminder for your students and will help them keep their work organized.
The final task asks the students to draw a line using the x- and y-intercepts. This task has an option enabled that displays the equation of the students’ graph as they manipulate the line. Students can see when they have the line matched up to the equation y=-2x+10.
We encourage you to modify these tasks and content to align them with your instructional goals. Copy the poll, modify or delete any task, or add new tasks. Please reach out with any questions or comments, we’re here to support you!
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