Story problems don't know when to add subtract multiply or divide

Addition: Add, Sum, Plus, Increase, Total

Subtraction: Subtract, Minus, Less, Difference, Decrease, Take Away, Deduct

Multiplication: Multiply, Product, By, Times, Lots Of

Division: Divide, Quotient, Goes Into, How Many Times

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!