Question #N428
If $y=2x+1$ and $x=3$, what is the value of $y$?
A. 4
B. 5
C. 6
D. 7
Correct Answer is: D
Substitute 3 for $x$ in the equation $y=2x+1$ to get $y = 2(3) + 1$. Simplifying, we get $y = 6 + 1$, or $y=7$.