Write a rule for the linear function in the table. x f(x) –3 –1 0 2 3 5 6 8 question 17 options: f(x) = x – 1 f(x) = x + 2 f(x) = 3x f(x) = x – 2

Table

  x    f(x)
–3    –1
  0      2
  3      5
  6      8

1) slope, m

slope = m = Δy / Δx = [2 - (-1) ] / [ 0 - (- 3) ] = 3 / 3 = 1

2) y intercept, b

x=0 => y = 2 = b

3) slope - intercept form of the equation: y = mx + b

=> y = x + 2

f(x) = x + 2

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.