# Suppose parametric equations for the line segment between (8,?9) and (?1,?3) have the form: x=a+bt y

Suppose parametric equations for the line segment between (8,?9) and (?1,?3) have the form:

x=a+bt

y=c+dt

If the parametric curve starts at (8,?9) when t=0 and ends at (?1,?3) at t=1, then find a, b, c, and d.