2. Estimate the slope of the graph at x = 1

Since  

x = 1

 is a vertical line, the slope is undefined.

Step-by-step explanation:

Undefined

The result in slope-intercept form:

or

(Both equations are the same thing. It can be written with a 0 or not with a 0).

Step-by-step explanation:

If you already have the y-intercept (10) and the slope (0), then all you need to do is to put it in slope-intercept form:

-Slope-intercept form equation:

(where represents the slope and represents the y-intercept).

(slope)

(y-intercept)

Slope-intercept form:

or  

Those two equations are the same thing.