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In the graph of $y=2x+3$ shown in the figure, the zero of the polynomial $2x+3$ is the $x$-coordinate of the point where the line intersects the $x$-axis. What is that zero? 
A$\dfrac{3}{2}$
B$-\dfrac{3}{2}$
C$-2$
D$2$
Answer & Solution
Correct answer: B. $-\dfrac{3}{2}$
A zero is the $x$-coordinate where the graph meets the $x$-axis. In the figure, the line intersects the $x$-axis at $\left(-\dfrac{3}{2},0\right)$, so the zero is $-\dfrac{3}{2}$.
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