okay so when you are finding the y intercept you want x = 0. so the y intercept is 4. Next the slope formula is y2 - y1 / x2 - x1
take two point and do that
2-0 / -3 - -6
2 / 3
y = 2/3x + 4
you can also plug in a point to check
0 = 2/3(-6) + 4
0 = -4 + 4
0 = 0
the answer is A