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.

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.