Coordinate Geometry

It is given that the inclination of a straight line x is 45 degree,and x passes through two points P(-2, 3) and Q(4, k).Find
a) the slope of x
b) the value of k

a)
The slope of x
= tan45°
= 1

b)
Slope of PQ = Slope of x
(k - 3)/(4 + 2) = 1
k - 3 = 6
k = 9

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