Product a is a 12 ounce bottle of generic mouthwash that sells for $1.39. product b is a 24 ounce bottle of mouthwash that cost $2.79. which is a better buy

The best buy is B. N your welcome

For product A;
12 ounces cost 1.39
1 ounce costs 0.12
For product B;
24 ounces cost 2.79
1 ounce cost 0.12
They are of similar costs

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!