Question

If f(x)=2x+8 what is f(-1.8)

Answer 1

The answer would be f(-1.8)= 4.4

Just substitute x with -1.8

2 times -1.8 equals -3.6 and -3.6 plus 8 equals to 4.4

Hope this helps, please mark brainliest!

Answer 2

To find this out, you plug it into x
f(x) = 2x + 8 
f(-1.8) = 2(-1.8) + 8
solve
f(-1.8) = -3.6 + 8 
f(-1.8) = 4.4

In other words, -1.8 is the x coordinate and the y coordinate is 4.4
so (-1.8, 4.4)

Hope this helps :)