Practice

1. Which kind of function best models the data in the table? Write

an equation to model the data.

A quadratic; y = - x2

ху

0

2

B

1

quadraticy

2

1

1.5

1

с

N

linear, y

HI

2

3

0.5

4

0

D

1

linear, y

=

2x+2

Answer: Linear; y=-x - 1

Step-by-step explanation: The slope is negative since it's decreasing. So it's not the first equation. It's not a quadratic equation because there is no forming U shape for this data. It's not a exponential function because the slope is not 3 and a exponential function is in the form y=a (b) ^x.