Vivian L. answered • 12/09/13

Tutor

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Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACH

Hi Edgar;

Slope-intercept form is...

y=mx+b

m is the slope.

b is the y-intercept, the value of y when x=0.

y=3x+b

We are given a point, (2, 3). Let's plug it in...

3=3(2)+b

3=6+b

Let's subtract 6 from both sides...

-6+3=6+b-6

-3=b

The equation is...

y=3x-3