Can someone explain how to write a function rule Please.

Question

anonymous · Answer

$$f(x) = x^2$$ is a function rule for a parabola that opens upwards and has a double root at x = 0.

is this what you mean?

221emily · Answer

um, IDK my questions have to do with ordered pairs, rate, and area.

anonymous · Answer

what info are you given?

221emily · Answer

well it will give me ordered pairs and it says that they represent a function then it tells me to write a rule that represents a the function.

anonymous · Answer

okay, what are the ordered pair?

anonymous · Answer

did you try plotting them to get an idea of the shape of the graph?

221emily · Answer

no I didn't

221emily · Answer

they look like a line

anonymous · Answer

so use two of the points to get a slope and write the equation of the line in slope-intercept form.
if all of the points are on the line then the slope-intercept form is the function rule:
f(x) = mx+b

221emily · Answer

ok thanks!!!!!!!!  :)

anonymous · Answer

you're welcome!