Point slope form is y-y1=m(x-x1) but first you must get a slope between two points using insert (-2,-1) and (6,5) 3/4 is your slope, then put this into point slope form y+1 = 3/4(x +2)
question does not seem complete, from what i know it sounds like he should add up the test scores and divide it by five, that will give him his average which should be his grade, please update question if possible
