Question

Let f(x)=10x .

Which function represents a transformation of f(x) by a vertical stretch with factor 1.25?



g(x)=100.8x

g(x)=1.25⋅10x

g(x)=0.8⋅10x

g(x)=101.25x

Answer 1

g(x)=1.25f(x)=12.5x produces a vertical stretch with a factor of 1.25. This is the same as 1.25・10x (answer option 2)

Answer 2

Answer: Option B

Step-by-step explanation:

the given function f(x)= 10x when stretch vertically with the factor 1.25 will give g(x) = 1.25.10x

option A and C are totally irrelevant

Option D is incorrect because two numbers 10x and 1.25 when added will not give 101.25x instead it will give 10x +1.25

and we will multiply them not add them.

Note: If a function is compressed then we divide the function by the given factor.