In slope intercept form, the equation of the line is: y=2x + 3.
The start/initial value is (0, 3), which is the y-intercept.
The slope is 2. Use the formula (y_2 - y_1)/(x_2 - x_1) and substitute the two (x,y) points given: (2, 7) and (-1, 1). 6/3 simplifies to 2.
The 2 is represented by m in slope int. form where y=mx+ b. Then the 3 is represented by b, the y-intercept.
Here’s a picture to show the plotted points and work. I hope this helps: