A line passes through the points (−2, 9) and (4, −3). What is the y-coordinate of the point on the line where x = 1?

Question

Accepted Answer

A. 3. The slope is (−3 − 9)/(4 − (−2)) = −2. From (−2, 9), moving 3 units right: y = 9 − 6 = 3.

Answer

B. 0 — 0 would put the x-intercept at 1; the line crosses y = 0 at x = 2.5.

Answer

C. 5 — 5 uses a slope of −4/3; the rise is −12 over a run of 6, slope −2.

Answer

D. −1 — −1 overshoots by one slope-step; from x = −2 to x = 1 is 3 steps, not 5.

Algebra practice question