50% is 30, it’s half of 60. 25% is the same as dividing by 4, 60/4 is 15.
He lost 8, so he is at -8, he then gains 15 so add 15 to -8"-8 + 15 = 7
He gains 7 so now add 7 to the total: 7+ 7 = 14
He then loses 4, so now subtract 4 from the total: 14 - 4 = 10
Answer: He gained 10 yards.
-2/25 is the slope
x1=4
hope this helps!