To the right are two different supply curves; S_E represents a very elastic supply, while S_I represents a very inelastic supply.

   When price increases from P₁ to P₂ on S_I (an inelastic supply curve), the effect on quantity supplied is small, from Q₁ to Q₂.

    Consider the difference of the effect of a change in price from P₁ to P₂ on S_E (a very elastic supply curve). Here the effect on quantity supplied is many times larger, from Q₁ to Q₂.

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