Write an equation for the following transformation of y=x: a vertical stretch by a factor of 4.

y=4x

Step-by-step explanation:

We are given a equation of line, y=x

We need to find the equation of new line whose vertical stretch by a factor of 4.  

For vertical stretch or compress

If a>1 then vertical stretch

If 0<a<1 then vertical compress

Here vertical stretch by factor of 4

New equation becomes y=4x

Hence, The equation of transform line is y=4x

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

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