Observe the linear functions.

a. \ \

Graphical.

Case(i).

Graph the equation .

The -intercept is , the -intercept is .

Case(ii).

Graph the equation .

The -intercept is , there is no -intercept.

Case(iii).

Graph the equation .

The -intercept is , the -intercept is .

b.Tablular:

Function	One-to-one	Onto
	Yes	Yes
	No	No
	Yes	Yes

c. Verbal:

No; horizontal lines are neither one-to-one nor onto because only one -value is used and it is

repeated for every -value.

Every other linear function is one-to- one and onto because every -value has one unique value

that is not used by any other -element and every possible -value is used.

a. Graph:

Graph the equation .

Graph the equation .

Graph the equation .

b.Table

Function	One-to-one	Onto
	Yes	Yes
	No	No
	Yes	Yes

c. No; horizontal lines are neither one-to-one nor onto because only one -value is used and it is

repeated for every -value.