Choose the correct slope of the line shown on the graph below.
graph of a line passing through points negative 2 comma 1 and 0 comma negative 3

2

−2

one half

−one half

Question

Choose the correct slope of the line shown on the graph below.
graph of a line passing through points negative 2 comma 1 and 0 comma negative 3

2

−2

one half

−one half

anonymous · Answer

I think -2?

e.mccormick · Answer

Do you know the formula for finding slope?

Ah, an answer...  let me check.

e.mccormick · Answer

Yah.

anonymous · Answer

No i dont  really know the formula.

e.mccormick · Answer

Oh, well, the formula might help.  You did get it right, but let me do the formula.

anonymous · Answer

so your points can be simplified as - (-2, 1) and (0,-3)

If there are two points (x1,y1) and (x2,y2)

slope is given By = M = y2-y1/x2-x1.

anonymous · Answer

u hence get = -3-1/0-(-2)

which is -4/+2 which is -2.

e.mccormick · Answer

$$m=\frac{y_1-y_2}{x_1-x_2}$$Where m is the slope, and the x and y parts are from the two points.  So you are given $(x_1,y_1)$ and $(x_2,y_2)$ or pick them off a graph, and then put them into the formula.

anonymous · Answer

thanks both :)

e.mccormick · Answer

So if you get that formula down, you can use it for any slope.  They also call it:
$$\frac{\mathrm{Change\, in\, y}}{\mathrm{Change\, in\, x}}=\frac{\Delta y}{\Delta x}$$