if linear graph shows 1 marked on y and the second mark is directly on -2x

then the answer is m= -1/2

If you mean the points:

(0,1) and (-2,0)
then the slope is
(0-1)/(-2-0) = -1/-2 = +1/2

If you are actually looking at the graph and it slopes up to the right, then m is positive.

To determine the value of the slope (m) of a linear graph based on two marked points, you need to calculate the change in y divided by the change in x. Here's how you can do it:

1. Identify the coordinates of the two marked points on the graph. Let's call them (x1, y1) and (x2, y2).

In this case, the first marked point has a y-coordinate of 1, and the second marked point is directly on the line -2x (no specific y-coordinate is mentioned, so we can assume it to be a point on the line).

2. Calculate the change in y (Δy) by subtracting the y-coordinate of the first point from the y-coordinate of the second point: Δy = y2 - y1.

In this case, Δy = (-2x) - 1.

3. Calculate the change in x (Δx) by subtracting the x-coordinate of the first point from the x-coordinate of the second point: Δx = x2 - x1.

Since no specific x-coordinates are given, we don't have information to calculate Δx. However, if you're given specific x-values for the two points, you can substitute them in here.

4. Finally, calculate the slope (m) by dividing Δy by Δx: m = Δy / Δx.

Without the specific values for Δx, we cannot calculate the slope (m) in this case. But if you have the specific x-values, you can substitute them into the equation and solve for m.

Please provide the specific x-values so we can assist you further in finding the slope.