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# The SAT Math Test: Heart of Algebra

### Math questions on the test fall into different categories called "domains." One of these domains is Heart of Algebra.

You will not need to know domain names for the test; domains are a way for the College Board to break down your math score into helpful subscores on your score report, and they also ensure that each new SAT is balanced in the same way every time.
The SAT focuses strongly on algebra — especially on the areas of the subject that are most essential for success in college and careers. Questions in the Heart of Algebra domain will assess your ability to analyze, fluently solve, and create linear equations and inequalities, as well as systems of equations using multiple techniques.
Heart of Algebra questions may be straightforward fluency exercises or may pose bigger challenges, such as asking you to interpret the relationship between linear equations and their graphs.
Just a few examples of skills you will be asked to use:
• Solving linear equations in one variable
• Solving linear equations in two variables
• Creating and using a system of two variables and two linear equations
• Creating and using linear inequalities in one or two variables
• Identifying equations of lines on a graph
Identifying equations of lines on a graph
The graph of line k is shown in the x, y-plane above. Which of the following is an equation of a line that is perpendicular to line k ?