A table shows that when $x=0$, $y=3$, and when $x=2$, $y=7$. Assuming $y$ depends linearly on $x$, find the linear equation $y=mx+b$, and then compute $y$ when $x=4$.

• A. $y=2x+3$, and when $x=4$, $y=11$
• B. $y=2x-3$, and when $x=4$, $y=5$
• C. $y=3x$, and when $x=4$, $y=12$
• D. $y=4x+3$, and when $x=4$, $y=19$

Answer: (A)