The answer is z is about equal to 380.4
Here is my math
952/3=317*2=643/100=6.43*40=253.6
643-253.6=380.4
C because if you look at the intercept it’s a y and the y inception is equivalent to 4 so y=4x-14
Since the 90% is 63. divide it by 9. then you would get value of 7. then multiple it by 10.
which is equal to 70. so 100% is 70.
