Question

Which of the following functions has the function rule y = x + 4?

{(0, 2), (-2, -6), (1, 5)}
{(2, 6), (-3, -7), (0, 4)}
{(-3, 1), (0, 4), (2, 6)}
{(-2, 2), (-1, -5), (3, 7)}

Answer 1

The answer is {(-3, 1), (0, 4), (2, 6)}. U use substitution to solve.So substitute x in Y= X+4

Substitute x with 2 so the equation now reads

Y= 2+4
=6
Remember the first number is always =x and the second number is always Y

Answer 2

Function rule {(-3, 1), (0, 4), (2, 6)}

Explanation:

Given : y = x + 4.

To find : Which of the following functions has the function rule.

Solution : We have given y = x + 4.

For x = -3

y = -3 +4

y = 1.

For x = 0

y = 0 +4

y = 4.

For x = 2

y = 2+ 4

y = 6.

Then {(-3, 1), (0, 4), (2, 6)}

Therefore, Function rule {(-3, 1), (0, 4), (2, 6)}