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Question

The equation of a straight line whose y intercept is 3 and inclined at an angle of 45 to the x-axis is


  1. y = x + 3

  2. y = x - 1

  3. y = 45x + 3

  4. y = x + 45


Solution

The correct option is A

y = x + 3


Given , 
y-intercept = 3 = c
θ =45 

 Slope(m) = tan 45 = 1
Equation of the line in slope - intercept form is:
y = mx + c  
 y = x + 3

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