Question 117613
Make a table of value of the form (x,f(x)).
Pick values. 
For x=0, f(x)=3(0)+2=2
For x=1, f(x)=3(1)+2=5
For x=2, f(x)=3(2)+2=8
Don't forget some negative values also. 
For x=-1, f(x)=3(-1)+2 = -1
For x=-2, f(x)=3(-2)+2 = -4
Then get graph paper. 
Draw an x-axis horizontally. 
Draw an f(x) or y-axis vertically.
Then plot the points.
(0,2) Zero units on the x, 2 units up (positive) on the y. 
 {{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3))}}}
(1,5) 1 unit to the right(positive) on the x, 5 units up on the y.
 {{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3),circle(1,5,.3))}}}
(2,8)Two units on the x, 8 units up on the y. 
 {{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3),circle(1,5,.3),circle(2,8,.3))}}}
(-1,-1) One unit left (negative), one unit down (negative) on the y.
 {{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3),circle(1,5,.3),circle(2,8,.3),circle(-1,-1,.3))}}}
(-2,-4)
 {{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3),circle(1,5,.3),circle(2,8,.3),circle(-1,-1,.3),circle(-2,-4,.3))}}}
Then finally you connect all the points together.
This function actually represents a straight line.
{{{drawing( 300, 300, -10, 10, -10, 10,grid( 1 ),circle(0,2,.3),circle(1,5,.3),circle(2,8,.3),circle(-1,-1,.3),circle(-2,-4,.3),graph( 300, 300, -10,10, -10, 10, 3x+2))}}}