What is the y-intercept of the equation 4x + 5y = 20?

The y-intercept occurs where the graph crosses the y-axis, so x = 0. Substituting into 4x + 5y = 20 gives 5y = 20, so y = 4. Therefore, the y-intercept is (0, 4), choice A.

AI-written and checked against the verified answer.