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A line with a slope of –9 passes through the point (1, –9) . What is its equation in slope -intercept form?

Sagot :

reinhard10158

Step-by-step explanation:

we start with the point-slope form

y - y1 = a(x - x1)

where "a" is the slope, (x1, y1) is a point on the line, and then we simplify that equation giving us the slope-intercept form

y = ax + b

so,

y - -9 = -9(x - 1)

y + 9 = -9(x - 1)

and now simplifying this

y + 9 = -9x + 9

y = -9x

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