A salesman receives a salary of $400 per week plus a commission of 5% of sales. Write a linear model for the weekly income y in terms of sales x.

Y=400+.05*x

To write the linear model for the weekly income, we need to consider the fixed salary and the commission based on sales.

Let's assign the following variables:
- y: Weekly income (in dollars)
- x: Sales (in dollars)

The fixed salary is $400 per week, which means it does not change based on sales. Therefore, this will be the y-intercept of the linear equation.

The commission is 5% of sales. To calculate the commission, we multiply the sales by 0.05.

So, the linear model for the weekly income can be written as:

y = 0.05x + 400

To write a linear model for the weekly income y in terms of sales x, we need to consider the fixed salary component and the commission component.

The fixed salary component is given as $400 per week, which remains constant regardless of the sales made.

The commission component is calculated as 5% of the sales x. This means that the commission component will vary based on the sales made.

Therefore, the linear model for the weekly income y in terms of sales x can be written as:

y = 400 + 0.05x,

where:
y represents the weekly income,
x represents the sales made.

In this model, the fixed salary of $400 is added to the commission component, which is calculated by multiplying the sales x by 0.05 (or 5%).