alex145 alex145

04-07-2016
Mathematics

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what is the equation of a line that passes through (7,8) and has a slope of -3

Respuesta :

04-07-2016

y = mx + b

m = slope = -3

y = -3x + b

We need to find b, so plug 7 for x and 8 for y

8 = -3*7 + b

8 = -21 + b

Add 21

29 = b

So the equation is y = -3x + 29.

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