I'm stuck between answers B AND D, But I'm leaning towards B, I Need help though so if anyone can let me know/explain?

Dave receives a salary of $200 a week plus a commission of 10% of his weekly sales. An equation y=mx+b represents Dave’s weekly earnings. The y-intercept is Dave’s base salary. The slope of the line is his commission.

y = 0.1x + 200

Step-by-step explanation:

Independent variable (y-intercept) = $200

Dependent variable (Slope) = 0.1 (10%)

Why?

Since Dave's salary is fixed, the $200 he is earning is an independent variable. The commission depends on his weekly sales. The weekly sales is said to be "x". Since 10% is a dependent variable, it goes together with x.

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step-by-step explanation: