![\tt Step-by-step~explanation:](https://img.qammunity.org/2021/formulas/mathematics/middle-school/1yvv69zlhkbxhn4v3cihgxbj4z92s81wn4.png)
In order to solve, we need to know the formula for slope-intercept: y = mx + b. M stands for the slope, and b stands for the y-intercept, or where the line crosses the y-axis.
![\tt Step~1:](https://img.qammunity.org/2021/formulas/mathematics/high-school/td6u35j3gyzkyxq2z12ex68fup5boe9d1z.png)
Let's solve for the slope first. In order to find the slope, we need to find the rise and run of the line. The line rises 3 units before intersecting with a point, so that is the rise. The line goes across 1 unit, so that is the run of the line. Slope = rise/run. Slope = 3/1 = 3.
![\tt Step~2:](https://img.qammunity.org/2021/formulas/mathematics/high-school/42ystigthi5jraeckxqu1502a0bp41zkf4.png)
Now that we have the slope, we can solve for the y-intercept. We can see clearly that the line passes through 3 on the y-axis, so that is our y-intercept, or b. y = mx + b → y = 3x + 3
![\Large\boxed{\tt Our~final~answer:~y=3x+3}](https://img.qammunity.org/2021/formulas/mathematics/college/xb9az9g9odrk4cdz7jyymgut6un2q61u6i.png)