Soru
At a price of 2.26 per bushel, the supply of a certain grain is 7500 million bushels and the demand is 7600 million bushels. At a price of 2.31 per bushel, the supply is 7900 million bushels and the demand is 7500 million bushels. (A) Find a price -Supply equation of the form p=mx+b where p is the price in dollars and x is the supply in millions of bushels. (B) Find a price -demand equation of the form p=mx+b where p is the price in dollars and x is the demand in millions of bushels. (C) Find the equilibrium point. (D) Graph the price supply equation, price-demand equation, and equilibrium point t in the same coordinate system (A) The price-supply equation is p=0.000125x+1.3225 (Type an exact answer.) (B) The price-demand equation is p = p=-0.0005x+6.06 (Type an exact answer.) (C) The equilibrium point is square (Type an ordered pair Type an exact answer.Use integers or decimals for any numbers in the expression.)
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Profesyonel · 6 yıl öğretmeniUzman doğrulaması
Cevap
To find the price-supply equation, we can use the given data points (7500, 2.26) and (7900, 2.31). We can use these points to find the slope (m) and the y-intercept (b) of the equation in the form p = mx + b.<br /><br />Step 1: Find the slope (m) using the formula:<br />m = (y2 - y1) / (x2 - x1)<br />m = (2.31 - 2.26) / (7900 - 7500)<br />m = 0.000125<br /><br />Step 2: Substitute one of the points into the equation p = mx + b to solve for b.<br />Using the point (7500, 2.26):<br />2.26 = 0.000125(7500) + b<br />b = 1.3225<br /><br />Therefore, the price-supply equation is:<br />p = 0.000125x + 1.3225<br /><br />To find the price-demand equation, we can use the given data points (7600, 2.26) and (7500, 2.31). We can use these points to find the slope (m) and the y-intercept (b) of the equation in the form p = mx + b.<br /><br />Step 1: Find the slope (m) using the formula:<br />m = (y2 - y1) / (x2 - x1)<br />m = (2.26 - 2.31) / (7600 - 7500)<br />m = -0.0005<br /><br />Step 2: Substitute one of the points into the equation p = mx + b to solve for b.<br />Using the point (7600, 2.26):<br />2.26 = -0.0005(7600) + b<br />b = 6.06<br /><br />Therefore, the price-demand equation is:<br />p = -0.0005x + 6.06<br /><br />To find the equilibrium point, we need to set the price-supply equation equal to the price-demand equation and solve for x.<br /><br />0.000125x + 1.3225 = -0.0005x + 6.06<br />0.000625x = 4.7375<br />x = 7540<br /><br />Now, substitute x back into either the price-supply equation or the price-demand equation to find the equilibrium price (p).<br /><br />Using the price-supply equation:<br />p = 0.000125(7540) + 1.3225<br />p = 2.30<br /><br />Therefore, the equilibrium point is:<br />(7540, 2.30)<br /><br />So, the final answers are:<br />(A) The price-supply equation is p = 0.000125x + 1.3225<br />(B) The price-demand equation is p = -0.0005x + 6.06<br />(C) The equilibrium point is (7540, 2.30)
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