Since the slope stays the same as it's parallel, we have y=(3/4)x+b. Plugging (2,-1) in, we get -1=3*2/4+b=6/4+b=1.5+b. Subtracting 1.5 from both sides, we get -2.5=b and our equation being y=(3/4)x-2.5 (since in y=mx+b, y and x remain as variables)
This is a question related to Science dear!
So it will be y1-y2, so 15-20 is -5
Then x1-x2, so 10-15 is -5.
-5/-5 = 1
There’s ya slope : 1
X - the score he must get

He must get at least 92 points.