A model draws a perfectly straight line, so its rule has the form
f(x)=mx+bf(x) = mx + bf(x)=mx+b
Only two of its outputs are known:
f(2)=7andf(6)=−5f(2) = 7 \qquad \text{and} \qquad f(6) = -5f(2)=7andf(6)=−5
Find the slope mmm, the starting height bbb, and the input xxx at which the model outputs exactly 111.
Select all that apply.
m=3m = 3m=3, b=1b = 1b=1, x=0x = 0x=0
m=−13m = -\tfrac{1}{3}m=−31, b=233b = \tfrac{23}{3}b=323, x=20x = 20x=20
m=−3m = -3m=−3, b=7b = 7b=7, x=2x = 2x=2
m=−3m = -3m=−3, b=13b = 13b=13, x=4x = 4x=4