4) A mixture contains 15 gallons of water and 5 gallons of juice. If 10 more gal lons of water are added, what part of the mixture is juice

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!

Bplant 3 and 1 because if you look closely at the graph it will show how high it grew it was tricky but you'll get through with it