Free SAT Linear functions practice questionsdigital SAT, 2026 format
A function defined by an equation, a table, or a graph. Evaluate it, find its equation, or interpret the slope and intercept in a real context.
Answer each question, then read why the right answer is right and why the tempting one is wrong.
Question 1
The table gives values of the linear function f for selected values of x. x | f(x) 1 | 11 3 | 5 6 | −4 Which equation defines f?
Question 2
For a linear function f, f(2) = 10 and f(6) = 22. The function g is defined by g(x) = f(x) − f(0). What is the value of g(10)?
Question 3
The graph of the linear function f in the xy-plane passes through the points (1, 8) and (4, 2). What is the y-coordinate of the y-intercept of the graph?
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More free SAT Math practice
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