Question

the pair of points (6,y) and (10,-1) lie on a line with slope 1/4. what is the value of y?

Answer 1

look:
\[\frac{ y+1 }{ 6-10 }=1/4\]

Answer 2

\[y+1=1/4*-4\]
\[y+1=-1\]
\[y=-2\]

lets check: (-2+1)/(6-10)=(-1)/(-4)=1/4

so y=-2

Answer 3

can you help me with this question?
What is the slope of a vertical line?