Respuesta :

mhanifa

Answer:

  • D. f(x) = 4x - 3

Step-by-step explanation:

Use two pairs of points to work out the equation:

  • (1, 1) and (2, 5)

Find the slope:

  • m = (5 - 1) / (2 - 1) = 4/1 = 4

Find the y-intercept:

  • 1 = 4*1 + b
  • b = 1 - 4
  • b = - 3

The line is:

  • f(x) = 4x - 3

Correct choice is D