document.write( "Question 561733: what is the formula for Fahrenheit scale is a linear function of temperature on the celsius scale.
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Algebra.Com's Answer #364370 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
what is the formula for Fahrenheit scale is a linear function of temperature on the celsius scale.
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document.write( "1.  Add 40\r\n" );
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document.write( "    Remember the \"four F\" rule: \"Fahrenheit First, Five First\"\r\n" );
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document.write( "2.  Multiply by 5  if Fahrenheit is First, otherwise mutiply by 9\r\n" );
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document.write( "3.  Divide by 9 if you multiplied by 5 in step 2, otherwise divide by 5\r\n" );
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document.write( "   Notice that steps 2 and 3 are always 5 and 9 or 9 and 5. Five First\r\n" );
document.write( "    if Fahrenheit is First \r\n" );
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document.write( "4.  Subtract 40.\r\n" );
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document.write( "Suppose we have 50°F to change to Celcius\r\n" );
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document.write( "1.  Add 40°\r\n" );
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document.write( "We get 50°+40°=90°.\r\n" );
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document.write( "    Remember the \"four F\" rule: \"Fahrenheit First, Five First\"\r\n" );
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document.write( "We began with °F so we say \"Five first\".\r\n" );
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document.write( "2.  Multiply by 5  if Fahrenheit is First, otherwise mutiply by 9\r\n" );
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document.write( "We had F first, so we multiply by 5 first and we get 90°x5 = 450°.\r\n" );
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document.write( "3.  Divide by 9 if you multiplied by 5 in step 2, otherwise divide by 5\r\n" );
document.write( "We multiplied by 5 in step 2, so we divide by 9 and we get 450°÷9 = 50°.\r\n" );
document.write( "   Notice that steps 2 and 3 are always 5 and 9 or 9 and 5. Five First\r\n" );
document.write( "    if Fahrenheit is First \r\n" );
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document.write( "Yes we noticed that\r\n" );
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document.write( "4.  Subtract 40.\r\n" );
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document.write( "We subtract 40° and we get 50°-40° = 10°C.\r\n" );
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document.write( "Now let's go backwards and start with 10°C and see if we can get 50°F\r\n" );
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document.write( "1. Add 40°\r\n" );
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document.write( "We get 10°+40°=50°.\r\n" );
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document.write( "Remember the four F rule: \"Fahrenheit First, Five First\"\r\n" );
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document.write( "We began with °C so we DO NOT say \"Five first\".\r\n" );
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document.write( "2. Multiply by 5 if Fahrenheit is First, otherwise mutiply by 9\r\n" );
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document.write( "We DO NOT have F first, so we multiply by 9 first and we get 50°x9 = 450°\r\n" );
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document.write( "3. Divide by 9 if you multiplied by 5 in step 2, otherwise divide by 5\r\n" );
document.write( "We multiplied by 9 in step 2, so we divide by 5 and we get 450°÷5 = 90°.\r\n" );
document.write( "Notice that steps 2 and 3 are always 5 and 9 or 9 and 5. Five First\r\n" );
document.write( "if Fahrenheit is First \r\n" );
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document.write( "Yes we noticed that.\r\n" );
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document.write( "4. Subtract 40.\r\n" );
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document.write( "We subtract 40° and we get 90°-40° = 50°F.\r\n" );
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document.write( "Suppose we have 77°F to change to Celcius\r\n" );
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document.write( "1. Add 40°\r\n" );
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document.write( "We get 77°+40°=117°\r\n" );
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document.write( "Remember the \"four F\" rule: \"Fahrenheit First, Five First\"\r\n" );
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document.write( "We began with °F so we say \"Five first\"\r\n" );
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document.write( "2. Multiply by 5 if Fahrenheit is First, otherwise mutiply by 9\r\n" );
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document.write( "We had F first, so we multiply by 5 first and we get 117°x5 = 585°\r\n" );
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document.write( "3. Divide by 9 if you multiplied by 5 in step 2, otherwise divide by 5\r\n" );
document.write( "We multiplied by 5 in step 2, so we divide by 9 and we get 585°÷9 = 65°\r\n" );
document.write( "Notice that steps 2 and 3 are always 5 and 9 or 9 and 5. Five First\r\n" );
document.write( "if Fahrenheit is First \r\n" );
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document.write( "Yes we noticed that.\r\n" );
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document.write( "4. Subtract 40.\r\n" );
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document.write( "We subtract 40° and we get 65°-40° = 25°C.\r\n" );
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document.write( "Now let's go backwards and start with 25°C and see if we can get 77°F\r\n" );
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document.write( "1. Add 40°\r\n" );
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document.write( "We get 25°+40°=65°.\r\n" );
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document.write( "Remember the four F rule: \"Fahrenheit First, Five First\"\r\n" );
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document.write( "We began with °C so we DO NOT say \"Five first\".\r\n" );
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document.write( "2. Multiply by 5 if Fahrenheit is First, otherwise mutiply by 9\r\n" );
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document.write( "We DO NOT have F first, so we multiply by 9 first and we get 65°x9 = 585°.\r\n" );
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document.write( "3. Divide by 9 if you multiplied by 5 in step 2, otherwise divide by 5\r\n" );
document.write( "We multiplied by 9 in step 2, so we divide by 5 and we get 585°÷5 = 117°.\r\n" );
document.write( "Notice that steps 2 and 3 are always 5 and 9 or 9 and 5. Five First\r\n" );
document.write( "if Fahrenheit is First \r\n" );
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document.write( "Yes we noticed that.\r\n" );
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document.write( "4. Subtract 40.\r\n" );
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document.write( "We subtract 40° and we get 117°-40° = 77°F.\r\n" );
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document.write( "Edwin
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