Write the function with values f(-5) = 9 and f(11) = -39

Answer 1

that's the two points

(-5,9) and (11,-39) with slope = -48/16 = -3

use the point slope formula with either point

y-9 = -3(x+5)

f(x) = y = -3(x+5) + 9

= -3x -15 +9

= -3x +6