About Y-Intercept:
Y - intercept is part of an ordered pair. The y-intercept is the 2nd number in an ordered pair. Like, for example, (3,5)... 3 is the x - intercept & 5 is the y -intercept. Y-intercept is a point on the line & is also known as the starting point. Y - intercepts can be used in 4 different forms: Standard Form, Slope -Intercept Form, Point Slop Form, and this form (Y2 - Y1)
X2 - X1
Hope this info helps!!! :)