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What is the equation of the line through (8, 1) that is parallel to y = -2x + 5?

A. y = -2x + 17
B. y = (1/2)x - 3
C. y = 2x - 15
D. y = 8x + 1

User Soggiorno
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1 Answer

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Answer:

Correct answer: A. y = -2x + 17

Explanation:

Given:

Some point A(8, 1) through which the required line passes

y = -2x + 5 the equation of the line with which the required line is parallel

y = a x + b the equation of the required line

where a is a slope and b is intercept on the y axis

If the two straight line are parallel then their slopes are equal:

a = -2

If in the equation of the required line we replace the coordinates of the given point and the slope a we get:

1 = -2 · 8 + b = - 16 + b ⇒ b = 17

The equation of the required line is:

y = - 2x + 17

God is with you!!!

User Yakir Manor
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