Common Core maths standard · High School Algebra, High School Modeling

HSA-REI.C.6

Solve systems of linear equations exactly and approximately, focusing on where the graphs intersect. Model a real choice with linear functions, find the break-even point, and use it to decide. 2 games practise it.

High School · Algebra

Structure in expressions · Polynomials · Equations & inequalities

1 think & learn

Systems by Graph

Think & learn HSA-REI.C.6 · HSA-REI.D.11

Where two lines cross, both equations are true. Find the crossing — or prove there isn’t one.

High School · Modeling

Real situations modelled with linear, exponential and quadratic functions, estimation and data

1 think & learn

Phone Plan Showdown

Think & learn HSA-CED.A.2 · HSA-REI.C.6

Two phone plans, one budget. Build the models, find the break-even, make the smart choice.