Question

What is the y-intercept of f(x) = -4x^2 + 6x - 5?

Answer 1

y-intercept is a point where line intersect the y-axis when `x=0`
so substitute x for 0 solve for y

Answer 2

f(x) is same as y
\[\rm \color{Red}{y} = -4\color{blue}{x^2} + 6\color{blue}{x} - 5\]