SOLUTION: Write a formula that expresses the relationship described below
y varies directly as x and y = –10 when x = –7.
What are the key words that I should notice that helps me writ
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Question 150793: Write a formula that expresses the relationship described below
y varies directly as x and y = –10 when x = –7.
What are the key words that I should notice that helps me write formulas?....I know y = ?/?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
A direct variance means that as x increases y increases. Also as x decreases y decreases . So this is reflected by the equation
Start with the given equation.
Plug in and .
Rearrange the terms
Divide both sides by -7.
Reduce
Rearrange the equation
So the equation is
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