Question: What is the equation of the line that passes through the points (1, 2) and (2, 3)?

Options:

1. y = x + 1
2. y = 2x
3. y = x + 2
4. y = 3x - 1

Correct Answer: y = x + 1

Solution:

First, find the slope: m = (3 - 2) / (2 - 1) = 1. Using point-slope form: y - 2 = 1(x - 1) => y = x + 1.