## hali12 3 years ago Let f(x) = -4x +8. Write the rule for a new function as a vertical translation of f(x) three units down. Do not graph. If you just give me the anwser I'll give u a medel

1. Frank1991

f(x)=-4x+5

2. tyteen4a03

The translation of a vertical function is f(x) - c, where c is the unit of translation. In this case, the function would become f(x) = -4x+8 - 3.

3. Frank1991

But the -4 is the slope of the line and the 8 is the point where the line crosses the y-axis. Therefore, you only have to subtract 3 from the equation to obtain the new equation. and so the line is lowered by 3 units

4. tyteen4a03

@Frank1991 That is exactly what f(x) - c means...

5. hali12

????

6. Frank1991

|dw:1349873197095:dw|

7. Frank1991

So b is the point where the equation crosses the y-axis. And if you change it by +1 the line just skips vertical up with 1.

8. Frank1991

In your case it has to skip down with 3 units, so just subtract 3 units from your b (which is 8) you can check it with google (just type the equation is the search bar)

9. hali12

idk?

10. estudier
11. hali12

you cant graph it.... is it 8?