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Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

0 votes

A. -2

B. 8

C. -8

D. 2

asked Jul 11, 2013 in GEOMETRY by harvy0496 Apprentice

1 Answer

0 votes

The line is passing through points ( 10,5 ) and ( x,9 )

Slope (m) = -2

Slope of the line passing through the points (x₁- y₁), (x₂ - y₂) is m =( y₂ -y₁) / (x₂ - x₁)

-2 = (9 -5) / ( x -10)

-2x + 20 = 4

-2x = 4 -20

-2x = -16

x = 16/2

x = 8

The solution is x = 8

The correct option is B.

answered Jul 11, 2013 by anonymous

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