What is the best estimate for the product of 104.143 × 10,021.4

You can round 104.143 to 100 and you can round 10,021.4 to 10,000 so 100x10,000 = 1,000,000

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!