<p>In the xy-plane, the line with equation ax+by=1, where a and b are constants, intersects the y-axis where y=2. What is the value of b?</p>
<p>Its one of the student produced response questions.</p>
<p>Intersects the y-axis at y=2 means that (0,2) is a point on the line.
Sub x=0 and y=2 into the original equation
a(0)+b(2)=1
2b=1
b= 1/2</p>
<p>Wow, I put some deep thought then gave up! Thank you again.</p>