Question is in description

Question

Suppose x = 9 is a solution to the equation f(x) = g(x). If a table of values for the equation y = f(x) contains an x–value of 9 and a corresponding y–value of 18, then which of these statements is correct about a table of values for the equation y = g(x)? A If it contains an x–value of 9, the corresponding y–value must be 9. B If it contains an x–value of 9, the corresponding y–value must be 18. C If it contains a y–value of 18, the corresponding x–value must be 9. D If it contains a y–value of 18, the corresponding x–value must be 18.

Answer 1

The answer is there in the question itself

 

 

Suppose x = 9 is a solution to the equation f(x) = g(x). If a table of values for the equation y = f(x) contains an x–value of 9 and a corresponding y–value of 18, then which of these statements is correct about a table of values for the equation y = g(x)? A If it contains an x–value of 9, the corresponding y–value must be 9. B If it contains an x–value of 9, the corresponding y–value must be 18. C If it contains a y–value of 18, the corresponding x–value must be 9. D If it contains a y–value of 18, the corresponding x–value must be 18.

Answer 2

Hi Karoline,

 

Ok so when f(x) = g(x)  x =9

 

now f(x) = 18   when x = 9

 

but since we know that f(x) = g(x)  when x = 9 then g(x) = 18

 

that would lead us to pick answer B

 

B.

 

If it contains an x-value of 9 the corresponding y-value must be 18

 

Hope this helps