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Use tables to write linear equations
Grade Level
SAT Prep
M040 Use tables to write linear equations
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A quantity f(x) changes at a constant rate with respect to x. The table shows x: 7, 21, 42; f(x): -1, 3, 9. Which equation describes the relationship?
A
f(x) = -(2/7)x - 3
B
f(x) = (2/7)x - 1
C
f(x) = (2/7)x - 3
D
f(x) = 4x - 3
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