8th Grade Math Unit 4

Big Idea:

Basics of functions and representations of linear relationships

Student Expectations:

Priority TEKS

8.4(B) [Readiness] Graph proportional relationships, interpreting the unit rate as the slope of the line that models the relationship.

8.5(G) [Readiness] Identify functions using sets of ordered pairs, tables, mappings, and graphs.

8.9(A) [Supporting] Identify and verify the values of x and y that simultaneously satisfy two linear equations in the form y=mx+b from the intersections of the graphed equations.

Focus TEKS

8.5(A) [Supporting] Represent linear proportional situations with tables, graphs, and equations in the form of y=kx.

8.5(B) [Supporting] Represent linear non=proportional situations with tables, graphs,, and equations in the form of y=mx+b, where b is not = to 0.

8.5(E) [Supporting] Solve problems involving direct variation.

8.5(F) [Supporting] Distinguish between proportional and non-proportional situations using tables, graphs, and equations in the form of y=kx or y=mx+b, where b is not = to 0.

8.5(H) [Supporting] Identify examples of proportional and non-proportional functions that arise from mathematical and real-world problems.

Student Learning Targets:

• I will be able to find the unit rate
• I will represent y as a function of x based on each value of x being associated with a single value of y.
• I will use the vertical line test to identify a function.
• I will be able to graph a line from an equation in slope-intercept form.
• I will write what makes a graph proportional or non-proportional.

Essential Questions:

• How are functions useful in real-world settings?

Extra Information:

Adopted Textbook: McGraw-Hill 8th Grade Mathematics

District Grading Policy

Texas Gateway Online Resource Center