Marie was in charge of 75 employees prior to the pandemic. She is currently charge of 60 employees. By what percentage did the number of employees
change? Is this a percent increase or decrease?

-18

step-by-step explanation:

because mean value defines that total sum value over total number of set

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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

read more on -

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.