PSAT Math Multiple-Choice Question 809: Answer and Explanation
Question: 809
Which equation expresses the relationship between x and y shown in the graph below?
- A.
- B. y = 3x - 3
- C. y = 2x + 6
- D.
Correct Answer: A
Explanation:
(A) This line has a y-intercept of -3 since that is where the line intersects the y-axis. You can calculate the slope using points on the line, (0, -3) and (6, 0):
Putting this in slope-intercept form (y = mx + b) results in the equation of the line:
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