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x 6.20 6.85 7.50
y 3.90 5.20 6.50

The points on a linear graph are as shown in the table. Find the gradient (slope) of the line. 

A.

212

B.

2

C.

1

D.

12

Correct answer is B

Gradient = y2y1x2x1

= 5.203.906.856.20

= 1.30.5 

= 2



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