Answer:
mid point=(x1 + x2)/2 (y1 + y2)/2
(-5+5)/2 and (-7+4)/2
0 and 1.5
midpoint=(0,1.5)
Range: {.4, .8, 1.2, 1.6}
Domain: {0, 1, 2, 3}
Well, a unit rate usually has a denominator of 1 so...
Divide 600 calories by 1.5 h (600 ÷ 1.5) to get 400 calories/ 1 h
So the unit rate is 400 calories per h (not sure what 'h' stands for..)
He currently has 309 points in total. To have a mean of 80 after 5 tests, the total has to be 400, since 400 = 80*5.
400-309 = 91
So Skylar needs 91 points.