Question #N263
If the function $f(x) = 2x^2 + 3x - 1$ is graphed in the $xy$-plane, what is the $y$-coordinate of the $y$-intercept of the graph?
A. -1
B. 1
C. 2
D. 3
Correct Answer is: A
The y-intercept of a graph is the point where the graph crosses the y-axis. This occurs when $x=0$. Substituting 0 for $x$ in the function $f(x) = 2x^2 + 3x - 1$, we get $f(0) = 2(0)^2 + 3(0) - 1 = -1$. Therefore, the y-coordinate of the y-intercept is -1.