Step-by-step explanation:
label the numbers (x,y) and (x2,y2)
write down the distance formula
replace the xs and ys by the numbers and then solve them
Answer:
f(x)= -0.4x+107
1221 x 1221 = 1490841
square root of 1490841 is 1221
3
three
Answer is D) Y. It's matching with the results given