Answer: x/3 + y/4 = 1.
- A 4x + 3y = 12
- B 3x + 4y = 12
- C 4x - 3y = 12
- D x/3 + y/4 = 1
Correct answer: D. x/3 + y/4 = 1
Explanation: Intercept form: x/a + y/b = 1, where a=3, b=4. So x/3 + y/4 = 1. Multiplying: 4x + 3y = 12. Both A and D are equivalent.
The slope of a line is the ratio of vertical change (rise) to horizontal change (run) between any two points on it - equivalently, the tangent of the angle θ the line makes with the positive x-axis.