if the point (1, -1) lies on the graph of the equation 2x+ky=7 find the value of k?
Answers
Answer:
k=-5
Step-by-step explanation:
(x,y)=(1,-1)
so putting in equation
2×1+k(-1)=7
2-k=7
2-7=k
k=-5
Given : the point (1, -1) lies on the graph of the equation 2x+ky=7
To find : the value of k
Solution:
Coordinates of Every point lying on a line satisfy the equation of line
Equation of line :
2x + ky = 7
point ( 1 , - 1) lies on the line
Hence substituting x = 1 and y = - 1 should satisfy the equation
2(1) + k(-1) = 7
=> 2 - k = 7
=> -k = 7 - 2
=> - k = 5
=> k = - 5
Value of k is - 5
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