Question

Tomas works for a cellphone company. he has a base salary of $350 each month and earns an additional $40 for each cellphone he sells. write a function (linear equation) in slope-intercept form (y = mx + b) that represents tomas' total earnings (y) for one month for selling (x) number of cellphones.
Use the linear equation from question 1 to determine Tomas' earnings for a month where he sold 30 cellphones. *

Answer 1

Answer:

The function is $y = 40x + 350$

When he sold 30 cellphones, he earned $1550.

Step-by-step explanation:

Equation of a line:

The equation of a line has the following format:

$y = mx + b$

In which m is the slope(how much y changes when x changes by 1), and b is the y-intercept, that is, the value of w when x = 0.

Base salary of $350 each month and earns an additional $40 for each cellphone he sells.

If he sells 0 cellphones, he earns $350, so $b = 350$.

For each cellphone he sells, he earns $40, so $m = 40$

The function is:

$y = mx + b = 40x + 350$

Tomas' earnings for a month where he sold 30 cellphones.

This is y when $x = 30$. So

$y = 40*30 + 350 = 1550$

When he sold 30 cellphones, he earned $1550.