Slope is the ratio of rise to run.
Meaning: rise is the change in y value (height, rise). Run is the change in x value (run).
It is calculated as (y2-y1)/(x2-x1).
It is often represented by the letter m.
Y-intercept is the y value at which your curve crosses the y-intercept. Put another way, it's the y-value when x=0 (the y-axis).
Hope this helps.
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If you mean: y = -4x then the slope is -4 and there is no y intercept because the line cuts through the origin at (0, 0)
If you mean y = mx+b then the slope is m and the y intercept is b
Slope intercept is an equation of the form y=mx+b where m is the slope and b is the y-intercept.
y= slope + y-intercept
The slope intercept form is y=mx+b where m is the slope and b is the y intercept y=2x-8.