<PRE><B>Question 244189</B>
 X    Y
   2    3
   3    7
   4   11
   5   15
SLOPE=(7-3)/(3-2)=4/1=4
SLOPE=(11-7)/(4-3)=4/1=4
SLOPE=(15-11)/(5-4)=4/1=4
3=2*4+b
3=8+b
b=3-8
b=-5
Y=4X-5 ans. for the line equation.
{{{ graph( 300, 200, -6, 5, -10, 10, 4x -5) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 4x -5). </PRE>