Mathematics
Grade9
Easy

Question

The equation of the line passing through (-3, 4) and (2, 5) is _______.

  1. x - y = 7
  2. y = x + 2
  3. 5y = x + 23
  4. 3x - 2y = 6

hintHint:

To find the equation of the line when two coordinates are given we will the formula y minus y subscript 1 equals fraction numerator y subscript 2 minus y subscript 1 over denominator x subscript 2 minus x subscript 1 end fraction left parenthesis x minus x subscript 1 right parenthesis , when the two coordinates areleft parenthesis x subscript 1 comma y subscript 1 right parenthesis space a n d space left parenthesis x subscript 2 comma space y subscript 2 right parenthesis.

The correct answer is: 5y = x + 23


    The equation of the line passing through (-3, 4) and (2, 5) is
    y minus y subscript 1 equals fraction numerator y subscript 2 minus y subscript 1 over denominator x subscript 2 minus x subscript 1 end fraction left parenthesis x minus x subscript 1 right parenthesis
    rightwards double arrow y minus 4 equals fraction numerator 5 minus 4 over denominator 2 minus left parenthesis negative 3 right parenthesis end fraction left parenthesis x minus left parenthesis negative 3 right parenthesis right parenthesis
rightwards double arrow y minus 4 equals fraction numerator 1 over denominator 2 plus 3 end fraction left parenthesis x plus 3 right parenthesis
rightwards double arrow y minus 4 equals 1 fifth left parenthesis x plus 3 right parenthesis
rightwards double arrow left parenthesis y minus 4 right parenthesis 5 equals x plus 3
rightwards double arrow 5 y minus 20 equals x plus 3
rightwards double arrow 5 y equals x plus 3 plus 20
rightwards double arrow 5 y equals x plus 23

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