The length of DE is 3 bc they are dilated at a ratio of 1 : 1.5
1: -5 = 3m + c
2: -2 = 0 + c
From equation 2, we knew c = -2
So we sub into equation 1 and got the value of m
-5 = 3m - 2
m = -1
The equation of line is y = -x - 2
the equation would be y = 30 + x and if your brother will read for 15 minutes then you'll read for 45 minutes i believe.
Don't know if it's right, but do let me know! use percentage to visualise your workings. :)
Step-by-step explanation:
the proof is given above