Question

Write a rule for the linear function in the graph Plz help

Answer 1

Answer:

  y = -x +4

Step-by-step explanation:

The y-intercept of the line is at +4, so the only viable choice is the last choice.

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Each of the equations is shown in slope-intercept form:

  y = mx + b

where b is the y-intercept, the y-value when x=0. The graph shows that as point (0, 4). So, the equation you're looking for is ...

  y = (some x-term) +4

If you want to spend more brain power on the problem, you can compute the slope of the line as ...

  m = ∆y/∆x = (1-4)/(3-0) = -3/3 = -1

Now, you know for sure the equation of the line is ...

  y = -x +4