SOLUTION: Determine the equation of the straight line that passes through points ( -3 ; 1 ) and ( 1 ; -1 ).

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Question 1139235: Determine the equation of the straight line that passes through points ( -3 ; 1 ) and ( 1 ; -1 ).
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
to find the equation of the straight line that passes through points ( -3 ,+1 ) and ( 1,+-1+), first use given points to calculate a slope
m=%28y%5B2%5D-y%5B1%5D%29%2F+%28x%5B2%5D-x%5B1%5D%29.......plug in given coordinates

m=%28-1-1%29%2F+%281-%28-3%29%29

m=-2%2F+%281%2B3%29
m=-2%2F4
m=-1%2F2

now use point slope formula:
y-y%5B1%5D=m%28x-x%5B1%5D%29...plug in a slope and coordinates of one point
y-%28-1%29=-%281%2F2%29%28x-1%29
y%2B1=-%281%2F2%29x%2B1%2F2
y=-%281%2F2%29x%2B1%2F2-1
y=-%281%2F2%29x-1%2F2-> your answer

check: