Academic standards
- CCSS.Math.Content.6.EE.A.2
- Write, read, and evaluate expressions in which letters stand for numbers.
- CCSS.Math.Content.6.EE.B.7
- Solve real-world and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q and x are all...
- CCSS.Math.Content.6.EE.B.8
- Write an inequality of the form x > c or x < c to represent a constraint or condition in a real-world or mathematical problem. Recognize that...
- CCSS.Math.Content.6.EE.C.9
- Use variables to represent two quantities in a real-world problem that change in relationship to one another; write an equation to express one...
- CCSS.Math.Content.7.RP.A.2
- Recognize and represent proportional relationships between quantities.
- CCSS.Math.Content.8.EE.B.5
- Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships...
- CCSS.Math.Content.8.EE.B.6
- Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive...
- CCSS.Math.Content.8.F.A.3
- Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear. For...
- CCSS.Math.Content.8.SP.A.3
- Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For...
- GLE 0606.1.1
- Use mathematical language, symbols, and definitions while developing mathematical reasoning.
- GLE 0606.3.2
- Interpret and represent algebraic relationships with variables in expressions, simple equations and inequalities.
- GLE 0606.3.4
- Use expressions, equations and formulas to solve problems.
- GLE 0606.3.5
- Use multiple representations including symbolic algebra to model and/or solve contextual problems that involve linear relationships.
- GLE 0706.2.3
- Develop an understanding of and apply proportionality.
- GLE 0706.3.5
- Understand and graph proportional relationships.
- GLE 0706.3.6
- Conceptualize the meanings of slope using various interpretations, representations, and contexts.
- GLE 0706.3.7
- Use mathematical models involving linear equations to analyze real-world phenomena.
- GLE 0806.3.4
- Translate among verbal, tabular, graphical and algebraic representations of linear functions.
- GLE 0806.5.2
- Select, create, and use appropriate graphical representations of data (including scatterplots with lines of best fit) to make and test conjectures.
- SPI 0606.3.1
- Represent on a number line the solution of a linear inequality.
- SPI 0606.3.3
- Write equations that correspond to given situations or represent a given mathematical relationship.
- SPI 0606.3.5
- Translate between verbal expressions/sentences and algebraic expressions/equations.
- SPI 0706.1.3
- Recognize whether information given in a table, graph, or formula suggests a directly proportional, linear, inversely proportional, or other nonlinear relationship.
- SPI 0706.3.1
- Evaluate algebraic expressions involving rational values for coefficients and/or variables.
- SPI 0706.3.4
- Interpret the slope of a line as a unit rate given the graph of a proportional relationship.
- SPI 0706.3.5
- Represent proportional relationships with equations, tables and graphs.
- SPI 0806.1.3
- Calculates rates involving cost per unit to determine the best buy.
- SPI 0806.3.4
- Translate between various representations of a linear function.
- SPI 0806.3.7
- Identify, compare and contrast functions as linear or nonlinear.
- SPI 0806.5.3
- Generalize the relationship between two sets of data using scatterplots and lines of best fit.
- TSS.Math.6.EE.A.2
- Write, read, and evaluate expressions in which variables stand for numbers.
- TSS.Math.6.EE.B.7
- Solve real-world and mathematical problems by writing and solving onestep equations of the form x + p = q and px = q for cases in which p, q, and x are all...
- TSS.Math.6.EE.B.8
- Interpret and write an inequality of the form x > c or x
- TSS.Math.6.EE.C.9
- Use variables to represent two quantities in a real-world problem that change in relationship to one another.
- TSS.Math.7.RP.A.2
- Recognize and represent proportional relationships between quantities.
- TSS.Math.8.EE.B.5
- Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships represented in...
- TSS.Math.8.EE.B.6
- Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; know and derive...
- TSS.Math.8.F.A.3
- Know and interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear.
- TSS.Math.8.SP.A.3
- Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For example, in a...
Alignment of this item to academic standards is based on recommendations from content creators, resource curators, and visitors to this website. It is the responsibility of each educator to verify that the materials are appropriate for your content area, aligned to current academic standards, and will be beneficial to your specific students.
Essential and guiding questions:
Questions for Students:
- Can you think of a situation where there might be a positive slope for profit on items selling on eBay?
- What other kinds of items might sell for high prices in the future?
- How fast do you think the lines of profit for other items would come down?
- Do you think the profit and closing bids will always have an approximately linear relationship?
