Consider line ab, which contains points a(−2,7) and b(1,5).

a: what is the slope of ab?
b: what is the equation for ab in point-slope form?

select one answer choice for question a, and select all correct answer choices for question b.

a: −23
a: 32
b: y−5=23(x−1)
b: y+7=32(x−2)
b: y+7=−23(x−2)
a: −32
b: y+5=−32(x+1)
b: y+5=23(x+1)
b: y−7=−23(x+2)
b: y−5=−23(x−1)
a: 23
b: y−7=−32(x+2)