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I need help with a geometry problem

I need help with a geometry problem-example-1
User Kubanczyk
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Line BC passes through (-5,5) and (0 ,1)
Slope = 5-1/-5-0 = -4/5

Line BC cuts the y-axis at (0,1)
⇒ y-intercept must be 1

General Equation of a linear line: y = mx + b

Plug m = -4/5 and b = 1 into the general equation and find the equation of line BC:

y = -4/5x + 1

Multiply by 5 on both sides:
5y = -4x + 5

Add 4x to both sides:
4x + 5y = 5

Answer: 4x + 5y = 5 (Option C)
User Lnamba
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