Thread: Help on Slope and y-Intercept

Hello, my name is Kierston and in Gr. 9. I have a math question regarding Slope and y-intercept. I am having trouble finding the equation on a graph with points of (4,8) and (4,-6). When you connect the points, it looks like a vertical line not touching the y-axis. Now I know y = mx+b but how can I find the slope if a fraction can't have 0 and a y-intercept if the line isn't even touching the y-axis? I need help! Thanks!

Vertical lines all have the equation x = c for some constant c, and horizontal lines have the equation y = d for some constant d. Can you see what 'c' is in our case ?