How do you find the slope of (0,9)(4,7)?

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Answer 1 · 2016-06-07T11:35:29

$m=(Deltay)/(Deltax)=2/-4=-1/2$

We find the slope of a line (usually notated as $m$ ) with the following formula:

$m=(Deltay)/(Deltax)$ , (delta being the symbol for "change") or as some like to say:

$(Rise)/(Run)$

So what is the rise in the two points, or the difference between the two y values? $y_1=9$ and $y_2=7$ , so what is the change in y?

$9-7=2$

Now let's do the run, or the difference between the two x values. $x_1=0$ and $x_2=4$ , so what is the change in x?

$0-4=-4$

Putting it together:

$m=(Deltay)/(Deltax)=2/-4=-1/2$