Slope Intercept Form

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# Slope Intercept Form - PowerPoint PPT Presentation

Slope Intercept Form. Y intercept. The y-intercept is the point where a line crosses the y axis. At this point the value of x is 0. Y intercept. To find the y-intercept, plug 0 in for x in the linear equation and solve for y. y=3x-6 (0, -6). Slope. y=3x-6

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### Slope Intercept Form

Y intercept
• The y-intercept is the point where a line crosses the y axis.
• At this point the value of x is 0.
Y intercept
• To find the y-intercept, plug 0 in for x in the linear equation and solve for y.
• y=3x-6 (0, -6)
Slope
• y=3x-6
• To find the slope first find 2 points.
• (2, 0) and (0, -6)
• Then substitute in and solve
Slope Intercept Form
• y=mx + b
• m is
• b is the
Slope Intercept Form

y=3x-6

The slope is

The y intercept is

Slope Intercept Form

To graph y=3x-6

• Plot (0, -6)
• then count slope
• Up 3 right 1
• Connect your points to make a line.
Writing an Equation

Write the equation of the line with slope 3/8 and y-intercept 5.

Use slope intercept form:

Substitute in for m and b

You Try

Write the equation of a line with slope -.5 and y-intercept -3

y =

Write the equation of a line with slope 4 and y-intercept -5/2.

y =

You Try

Identify the slope and y intercept.

y = -5x + 13

Slope:

Y-Intercept:

Identify the slope and y intercept.

y = 1/4x – 2

Slope:

Y-Intercept:

Writing an Equation

Write the equation of the line with slope 2

That passes through pt. (1, 4).

• Use slope intercept form: y = mx + b
• Substitute in for m