In the rectangular coordinate system, what is the x-intercept of a line passing through (10, 3) and (−8, −6)? Choose the correct choice from the following options.
A) 4  B) 2  C) 0  D) − 2  E) − 4

Rationale: "slope = rise / run = 9 / 18 = 1 / 2 the equation of the line is y = ( 1 / 2 ) x + b 3 = ( 1 / 2 ) ( 10 ) + b b = - 2 the equation of the line is y = ( 1 / 2 ) x - 2 to find the x - intercept , let y = 0 : 0 = ( 1 / 2 ) x - 2 x = 4 the answer is a ."
Answer: A