Question 369416
-3x - 7y = 21
add 3x
-3x+3x-7y=3x+21
-7y=3x+21
/-7
y=(-3/7)x +(2/7)
compare with the equation in the slope intercept form y = mx +b
(2/7) is the y intercept.
co-ordinates are (0,2/7)
..
For x intercept plug y =0
(-3/7)x +(2/7)=0
..
(-3/7)x = -(2/7)
multiply by 7
-3x=-2
/-3
x= -2/3
the co-ordinates are(-2/3,0)
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{{{graph(300,300,-5,5,-5,5,(-3/7)x +(2/7))}}}
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m.ananth@hotmail.ca