# What is the y-intercept of the line y = 2x + 6?

It's $6$
You don't even need to remember any formula: the $y$-intercept is, quite intuitively, the point in which the line crosses the $y$-axis. But the point of that axis are the ones with $x$-coordinate equal to zero. So, you need to find the value of the function when evaluated for $x = 0$. In this case, $y \left(0\right) = 2 \cdot 0 + 6 = 6$.