Find the equation of the curve through (4,2) whose tangent (for x > 0)

forms an angle with the x-axis, the tangent of which is equal to 1 . Sketch the curve for x
x > 0.

1 answer

tangent is slope.

so for x>0, the slope is 1

constant slope, is straight line.

y=mx+b m=1
2=1*4+b
b=-2
y=x-2 is the equation
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