[{"hint": "Use m = (y₂ − y₁)/(x₂ − x₁).", "answer": "m = 2", "question": "Find the slope of the line passing through (2, 5) and (6, 13)."}, {"hint": "Use slope-intercept form: y = mx + b.", "answer": "y = 3x − 2", "question": "Write the equation of a line with slope 3 and y-intercept −2."}]