4-1 Identifying Linear Functions And 4-2 Using Intercepts

X-int.: −5; y-int.: −1

X-int.: −4; y-int.: 1

X-int.: −1; y-int.: −5

Not here

X-int.: 2; y-int.: −2

X-int: −2; y-int.: 6

X-int: −8; y-int.: 2

Not here

Not here

Not here

Graph A

Graph B

Graph C

Graph D

Yes, it is a function; yes, it is linear

Yes, it is a function; no, it is not linear

No, it is not a function

Yes, it is a linear function. There is a constant rate of change.

No, it is not a linear function. There is not a constant rate of change.

Yes, it is a function; yes, it is linear

Yes, it is a function; no, it is not linear

No, it is not a function

Yes, it is a linear function. There is a constant rate of change.

No, it is not a linear function. There is not a constant rate of change.