Question 253949
Your values are right but you made it harder than it really is.
You may have heard the expression that the a straight line is the shortest distance between two points.
It is also true that to draw a straight line you only need two points.
The two easiest point to find are when  x=0 and when y=0
your equation 
y=1/2*x+1
when x=0 y=1
when y=0 x=?


You have it your list.
notice something special about your line
It has a slant of 1/2 which means everytime that y goes up by 1 x goes up by 2.
It is not  a coincidence that your equation has a 1/2 in it. That is called the slope like a ski slope which means the slant or incline.
*[invoke describe_linear_equation -.5, 1, 1 ]