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2-9.

Write the equation for each graph. 2-9 HW eTool (Desmos). Homework Help ✎.

a.

graph

What is the y-intercept? Pick two points and determine the slope.

b.

graph

Refer to part (a).

c.

graph

Which value (x or y) is equal to 2 on this line? (Look at the point.)

All vertical lines have undefined slope and an equation of the form .

d.

graph

Refer to part (a).

Use the eTool below to check your answers by graphing your equation.
Click the link at right for the full version of the eTool: CCA2 2-9 HW eTool