Question

True or false. The y-intercept of the straight line with equation Ax + By + C = 0 is -C/B (B ≠ 0).

Answer 1

convert it to the form y = mx + b:

Ax + By + C = 0
By = -Ax - C
y = -(A/B)x - C/B

so indeed the y-intercept is -C/B