A radioactive element has a half-life of six days. What is the approximate decay rate of the element after the first day?
0.9%
1.5%
8.3%
10.9%

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!

5\16 x 2\5 = 10/80simplify to 1/80