Question

Functions f(x) and g(x) are described as follows:

f(x) = −4x2 + 5


x g(x)
0 0
1 4
2 8
3 4
4 0

Which statement best compares the maximum value of the two functions?

It is equal for both functions.
It is 3 units higher for f(x) than g(x).
It is 3 units lower for f(x) than g(x).
It is 4 units lower for f(x) than g(x).

Answer 1

What do you think the answer is?

Answer 2

I'm thinking the last one?

Answer 3

@tom982

Answer 4

@kropot72

Answer 5

@campbell_st

Answer 6

What is the maximum of f(x) and g(x)?

Answer 7

err not sure:?//

Answer 8

@tom982

Answer 9

Have a think. For f(x), it involves basic maths to work it out (see diagram). For g(x), you're given a table of values - which is the highest?