James walks to a coordinate of (4, 5) and then to (1, 2) which joins the two coordinate in a straight line. Find the: (i) Gradient (m) of the line joining the two points. (ii) Equation of the line joining the two points.​

gradient = slope = 1

Y =1X +1  is the equation

Step-by-step explanation:

x1y1  x2y2

45  12

(Y2-Y1)(2)-(5)=   -3  ΔY-3

(X2-X1)(1)-(4)=    -3  ΔX-3

slope=1          

B=1          

Y =1X +1    

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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