The school store sold a total of 55 shirts for $620. The shirts sold were either blue or gray. If the
blue shirts sold for $12 each and the gray shirts sold for $10 eac, how many color of each shirt
were sold?

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!