Question

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -1/2f(x)?

Answer 1

For negative sign , the graph reflects over x -axis and for 1/2 there will be a vertical compression

Explanation:

Parent function is f(x)= x

We need to find the effect of the graph when f(x) is replaced with -1/2f(x)

When negative sign is multiplied outside f(x) like -f(x), then there will be a reflection over x-axis

When negative sign is multiplied inside f(x) like f(-x) then there will be a reflection over y-axis

When a number is multiplied outside f(x) then there will be a vertical stretch or compression

Here 1/2 is multiplied outside f(x).
`(1)/(2)` is less than 1 so there will be a vertical compression

For negative sign , the graph reflects over x -axis and for 1/2 there will be a vertical compression