To prepare for a marathon run, Sue ran 27 miles before she blistered her heel, and then she walked 1 additional mile. Her running speed was 18 times as fast as her walking speed. She was running and walking for 5 hours.
Find Sue's running speed.

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!