## Algebra 2 (1st Edition)

$y=7x-16$
Let the equation have the form $y=mx+d$. $m$ is the rate of change and shows how much $y$ increases by when $x$ increases by $1$. Hence here $m=7$. Then since $y=12$ when $x=4$, $12=4\cdot7+d=28+d\\d=-16$. Thus the equation is: $y=7x-16$