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Plot y=a+bx , using the speciﬁed coefﬁcients and ranges (use increments of 0.1):

$a=2,b=0.3 \textrm{ for } 0\leq x\leq 5$
$a=3,b=0 \textrm{ for } 0\leq x\leq 10$
$a=4,b=-0.3 \textrm{ for } 0\leq x\leq 15$

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