Algebra practice question

Answer: A. y = −2x + 6

The line passes through (3, 0) and (0, 6). Slope: (6 − 0)/(0 − 3) = −2, and the y-intercept is 6: y = −2x + 6. Check: at x = 3, y = −6 + 6 = 0.

Why the other answers are wrong

B. y = 2x + 6

y = 2x + 6 has the right intercept but crosses the x-axis at x = −3.

C. y = −2x + 3

y = −2x + 3 has a y-intercept of 3, not 6.

D. y = 3x + 6

y = 3x + 6 crosses the x-axis at x = −2.

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