What is the slope of the line that passes through (2, 12) and (4, 20)

M = (20 - 12)/(4 - 2)
 = 8/2
 = 4
slope = m = 4

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!