SLOPE-INTERCEPT FORM

SLOPE-INTERCEPT FORM

y=mx+b

​What is the equation of this line?

Multiple Choice

What is the equation of this line?

The line has a slope of $$-\frac{1}{2}$$  with a y-intercept of 7. 

• $$y=7x-\frac{1}{2}$$  

• $$y=-\frac{1}{2}+7$$  

• $$y=-\frac{1}{2}x+7$$

• $$y=-\frac{1}{2}x-7$$

​The line passes through (1, -4) and has a slope of -2.

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​How did you learn how to do this last year?

​The line passes through (1, -4) and has a slope of -2.

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Let's use our equation y = mx+b to connect to what you learned last year!​

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y = mx + b

​-4 = -2(1) + b Plug in your point and slope

​ Solve for b (y-intercept)

​Rewrite your equation!

Multiple Choice

The lines passes through (-4, 8) and has a slope of  $$-\frac{3}{4}$$  

• $$y=-\frac{3}{4}x+11$$

• $$y=-\frac{3}{4}x+8$$

• $$y=-\frac{3}{4}x-5$$

• $$y=-\frac{3}{4}x+5$$  

​Let's discuss....

How do you write an equation when you're given:

​A graph:

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​A slope & y-intercept:

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​A point & a slope:

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​Two points: