Duane and mick are saving their money to build a new tree house. Duane adds 5 dollars. Mick adds 2 dollars every week. So far they saved 45 dollars. How many weeks have they been saving their money?

7 weeks

Step-by-step explanation:

45 divided by seven gives you 6.42857142857 but it is in weeks so you round it to 7.

d is correct

step-by-step explanation:

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0