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SAT Mathematics QUESTION #5470
Question 1
Line $t$ in the $xy$-plane has slope $-\frac{1}{3}$ and passes through $(9, 10)$. Which equation defines line $t$?
  • $y = \frac{1}{3}x - 13$
  • $y = 9x + 10$
  • $y = -\frac{x}{3} + 10$
  • $y = -\frac{x}{3} + 13$✔️
Correct Answer Explanation
$y - 10 = -\frac{1}{3}(x - 9) \implies y = -\frac{1}{3}x + 3 + 10 \implies y = -\frac{1}{3}x + 13$.