bonjour
g (x) = 1.5 x - 3
tu calcules 2 images pour tracer
g ( 0) = - 3
g ( 2) = 3 - 3 = 0
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f ( 0 ) = 3 et f ( 2 ) = 7
( 7 - 3 ) ; ( 2 - 0 )
= 4/2 = 2 donc ax = 2 x
f ( 0) = 3
0 * 2 + b = 3 donc b = 3
f (x) = 2 x + 3
