hello!!
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Remember, Slope-Intercept Form:-

where
m is the slope
b is the y-intercept
In the equation y=mx+b, the slope is m, and in the equation
, the slope is
and the y-intercept is 9.
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note:-
Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I will comment and/or edit my answer...