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Write an equation for a line in slope-intercept form passes through (3, 3) and (-6,-3).

 Mar 25, 2020

Best Answer 

 #1
avatar+23566 
+2

Slope intercept form    y = mx + b    m is slope  b is y- axis intercept (the value when x = 0)

 

slope =  (y1-y2) / (x1-x2)    = (3- -3) / (3 - -6)  = 6/9  = 2/3

 

y = 2/3 x + b    now put in one of the points to find the value of 'b'

3 = 2/3 (3) + b

3 = 2+b      b= 1

 

 

y = 2/3 x + 1

 Mar 25, 2020
 #1
avatar+23566 
+2
Best Answer

Slope intercept form    y = mx + b    m is slope  b is y- axis intercept (the value when x = 0)

 

slope =  (y1-y2) / (x1-x2)    = (3- -3) / (3 - -6)  = 6/9  = 2/3

 

y = 2/3 x + b    now put in one of the points to find the value of 'b'

3 = 2/3 (3) + b

3 = 2+b      b= 1

 

 

y = 2/3 x + 1

ElectricPavlov Mar 25, 2020
 #2
avatar+1956 
+2

Nice, EP!

CalTheGreat  Mar 25, 2020

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