Function Equations

This sentence is an equation of a function.

Every y-value is twice the corresponding x-value.

Which equation is correct?

• y = 0.129x

• y + 2 = x

• y = 2 + x

• y = 2x

Every y-value is 3 more than 4 times the corresponding x-value.

Which equation is correct?

• y + 3 = x + 4

• 3y = 4x

• y = 3 + 4x

• y = 34x

What is the y-intercept of this line?

• -4

• unknown

• 6

• -3

Write an equation for the function table.

Which table of values can be defined by y=x+5?

• a

• b

• c

Find the missing OUTPUT value.

• 8

• -2

• 2

• -8

If my function rule is x + 3, what is the OUTPUT if the input is 4?

• 4

• 3

• 7

• 10

If my function rule is 4x, what is the OUTPUT if the input is 5?

• 45

• 54

• 9

• 20

If my function rule is x - 5, what is the OUTPUT if the input is 14?

• 9

• 19

• 21

• 1

If my function rule is x÷3, what is the OUTPUT if the input is 12?

• 9

• 4

• 3

• 36