passpadi

2015

Mathematics

JAMB

Find the equation of a line which is form origin and passes through the point (−3, −4)

A.

y = 3x/4

B.

y = 4x/3

C.

y = 2x/3

D.

y = x/2

Correct Answer: y = 4x/3

Explanation

The slope of the line from (0, 0) passing through (-3, -4) = (−4−0)/(−3−0) = 4/3 Equation of a line is given as y=mx+b, where m = slope and b = intercept. To get the value of b, we use a point on the line, say (0, 0). y=4/3x+b 0=4/3(0)+b b = 0 The equation of the line is y = 4/3x

The slope of the line from (0, 0) passing through (-3, -4) = (−4−0)/(−3−0) = 4/3 Equation of a line is given as y=mx+b, where m = slope and b = intercept. To get the value of b, we use a point on the line, say (0, 0). y=4/3x+b 0=4/3(0)+b b = 0 The equation of the line is y = 4/3x
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