4. determine if each function is linear or nonlinear. (the equations are the first picture.)

a. linear, linear
b. nonlinear, linear
c. nonlinear, nonlinear
d. linear, nonlinear

5. determine if each function is linear or nonlinear. (second picture.)

a. linear, linear
b. nonlinear, linear
c. nonlinear, nonlinear
d. linear, nonlinear

6.(third picture)

a. (3, -5), (-5, 2), (-6, 3),
b. (-5, 3) (2, -5) (2,9) (3, -6) (5, 3)
c. (-5, 3) (2, 9) (3, 5)
d. (9,2) (-5,2) (-6,3) (-5,2) (3, -5)

7.(fourth picture)

a. y-4=-3(x+2)
b. 3x+y=1
c. y=(-3/2)x+1
d. y-1=-3x

8. what is the equation of a line with a slope of −2 and a point (-2 , 6) on the line?
express the equation in the form of y = mx + b where m is the slope and b is the y-intercept.

a. y=2x+2
b. y=-2x+2
c. y-6=-2x-4
d. 2x+y=2

9. the table shows the amount of money that sarah charges customers to sell newspapers. the table represents a linear functions. (fifth picture)

a. sarah earns 7$ for 1 hours of work
b. sarah charges $5 before she begins selling newspapers
c. sarah does not charge her costumers unless she has sold newspapers for at least 2 hours
d. sarah charges $5 an hour to sell newspapers