Question

Which equation of the linear function models the relationship shown in the table?
x y
2 21
4 17
5 15
8 9
10 5
A. y = −3x + 19
B. y = −2x + 25
C. y = 2x + 24
D. y = 2x + 21

Answer 1

Slope = (17−21)/(4−2) = −2. Using y = −2x + b and (2,21): 21 = −4 + b → b = 25. So y = −2x + 25. (B)