Question

What is the rule for this function:
range {-3,-2,-1,0,1}
domain {5,2,-1,-4,-7}

Answer 1

3x-4

Answer 2

sorry, -3x-4

Answer 3

Thank you so much!

Answer 4

no prob. in situations like these it is often helpful to look at the zero case, to see what might be added or subtracted

Answer 5

As x decreases by 3 each time, y increases by 1 each time.


So the slope is m = 1/(-3) = -1/3


Now pick any ordered pair, say (5,-3). So x = 5 and y=-3


Plug these values into


y-y1=m(x-x1)


y-(-3)=(-1/3)(x-5)


y+3=(-1/3)(x-5)


y+3=(-1/3)x-(1/3)(-5)


y+3=(-1/3)x+5/3


y=(-1/3)x+5/3-3


y=(-1/3)x-4/3

So the equation is \[\large y=-\frac{1}{3}x-\frac{4}{3}\]

Answer 6

Wow--Thank you!