Write the equation of a line from a table
Find the slope from two columns, then find b with one column.
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A linear relationship has x = 1, 3, 5 and y = 3, −1, −5. Write its equation in the form y = mx + b.
Answer: y = -2x + 5
A linear relationship has x = −2, 1, 4 and y = −2, 13, 28. Write its equation in the form y = mx + b.
Answer: y = 5x + 8
A linear relationship has x = 2, 5, 8 and y = −3, −12, −21. Write its equation in the form y = mx + b.
Answer: y = -3x + 3
Tip: Find the slope from two columns, then find b with one column.
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