Question

The scatter plot shows the wages of employees.

Answer 1

(1) The expected number of copies sold is 75

(2) The expected wage is $720

Explanation:

From the graph, we can see that x represents the number of copiers sold.

y represents the wages.

The equation of the graph is $y=6x+120$

(1) Given that an employee earn $570.

We need to determine the number of copiers sold.

Let us substitute $y=570$ in the equation $y=6x+120$, we get,

$570=6x+120$

$450=6x$

 $75=x$

Thus, the number of copiers sold is 75

(2) Given that if an employee sells 100 copiers, we need to determine the expected wage.

Let us substitute $x=100$ in the equation $y=6x+120$, we get,

$y=6(100)+120$

$y=600+120$

$y=720$

Thus, the expected wage is $720