Using the concept of slope and your answer in Exercise 21, give the equation of the line...

Using the concept of slope and your answer in Exercise 21, give the equation of the line whose graph is shown at the right.

REFERENCE:

Concept Check Based on your graphs of the functions in Exercises 7 and 8, what conclusion can you make about one particular point that must lie on the graph of the line y = ax (where b = 0 )?

Graph each linear function. Give the (a) x-intercept, (b) y-intercept, (c) domain, (d) range, and (e) slope of the line. Do not use a calculator .

7. ƒ(x) = 3x

8. ƒ(x) = -0.5x