https://file.aiquickdraw.com/mathbot/file/1727285404542u0m1n51z.jpg

The equation provided in the image is:

\[
y = 120x + 1600
\]

Where:
- $y$ represents Trey's total pay in dollars.
- $x$ represents the number of copies of *English is Fun* sold.

### First Question: 
**What is the change in Trey's total pay for each copy of *English is Fun* he sells?**

This question asks for the rate of change, which is the coefficient of $x$ in the equation. Here, that coefficient is $120$. Thus, for each copy Trey sells, his pay increases by **\$120**.

### Second Question: 
**What is Trey's total pay if he doesn't sell any copies of *English is Fun*?**

To find Trey's pay if he sells zero copies, substitute $x = 0$ into the equation:

\[
y = 120(0) + 1600 = 1600
\]

So, if Trey sells no copies, his total pay will be **\$1600**.

---

Would you like more details or have any other questions?

Here are 5 related questions for practice:
1. What would Trey's total pay be if he sold 10 copies of *English is Fun*?
2. How many copies must Trey sell to earn \$2800?
3. If Trey wants to earn \$4000, how many copies does he need to sell?
4. What would the equation look like if Trey earned \$150 for each copy sold instead of \$120?
5. If the base pay increased to \$2000, how would the equation change?

**Tip:** The coefficient of $x$ in a linear equation represents the rate of change or slope, which shows how much the dependent variable changes for every unit change in the independent variable.

Trey is a software salesman. Let y represent his total pay (in dollars). Let x represent the number of copies of English is Fun he sells. The equation for his total pay is y = 120x + 1600. What is the change in Trey’s total pay for each copy of English is Fun he sells? What is Trey’s total pay if he doesn’t sell any copies?

Learn how to calculate Trey’s total pay based on the number of copies of English is Fun he sells. Discover how the equation y = 120x + 1600 determines his pay increase per sale and his total pay if no sales are made.

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