Answer:
m = 1, b = 9
Explanation:
y = x + 9 could be (but doesn't have to be) rewritten as y = 1x + 9.
Comparing this to y = mx + b
quickly reveals the slope: m = 1, and the y-intercept: b = 9 (or 0, 9)
Slope: 1
Y-int: 9
In the equation for a linear equation (y = mx + b) m is the slope and b is y-int.
In this equation : y = x + 9, m is the coefficient before the x (1), and the y-int is the 9
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