SOLUTION: The line through (2,1) and (-3,n) has a gradient of -4. Find n

SOLUTION: The line through (2,1) and (-3,n) has a gradient of -4. Find n

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Question 803540: The line through (2,1) and (-3,n) has a gradient of -4. Find n
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
The line through (,) and (,) has a gradient of .
Find :
....use slope-intercept form to find equation of a line with a slope

........use point (,) to find y-intercept

so, your equation is:

and plug in point (,)

so, your point is at (,) =(,) and both points, (,) and (,) lie on a line

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