Question

through (2,6); no slope

Answer 1

think of the ordered pairs as x and y (x,y)-
to find a slope:

m=y2-y1)/(x2-x1)

so if it has no slope the line is vertical - no slope , because the denominator would be equal to zero

like in 2-2 so x would be 2, you could pick anything for y because the denominator would still equal zero, making it undefined or no slope

if the y's were equal then the slope would be 0

hope this helps