Answer
slope = -0.8
y-intercept = 0.4
Work Step by Step
You are given this formula
$y=0.4-0.8x$
You can arrange the formula to match the standard slope-intercept form:
$y=-0.8x+0.4$, which is in the form
$y=mx+b$.
Once the given formula is in slope-intercept form you can easily extract the slope and y-intercept.
