Answer: Even though this is kind of late, hope this helps you, and if not any future people!
Y = 2X + -3
Explanation:
I always start by getting my equation which is Y = MX + B. M is equal to the slope, and M is equal to the y-int. Then I am going to find the y-int so I can replace the B. To find the y-int you need to look for the point when x is 0. The y-int is -3 (0,-3). Now I will find the slope of this line. You can find the slop by using the equation Y2 - Y1 / X2 - X1 = slope, to find the slope. But an easier way than that is to use RISE / RUN. And in this equation, we rise 2 and run 1 which means the slope is 2 (2/1). The slope is positive as the line goes "uphill". (Look below)
Y = MX + B ➨ Y = MX + -3 ➨ Y = 2X + -3