Your answer is D ................
Hey!
------------------------------------------------
Steps To Solve:
x - 5y = −15 solve for y
~Isolate y by subtracting x to both sides
x - 5y - x = -15 - x
~Simplify
5y = -15 - x
~Divide 5 to each side
5y/5 = -15/5 - x/5
~Simplify
y = -3 - 1/5x
~Put into slope-intercept form
y = -1/5x + 3
------------------------------------------------
Hence, the answer is 
------------------------------------------------
Hope This Helped! Good Luck!
Answer:
no
Step-by-step explanation:
this is incorrect because it will not be double every month.
<h3>The equation in slope intercept form that models the cost of the work performed is: y = 78x + 79</h3><h3>It costs $ 547 if the plumber works for 6 hours</h3>
<em><u>Solution:</u></em>
Let "y" be the total cost of the house call plus labor
Let "x" be the number of hours worked
A plumber charges a flat rate of $79 to make a house call and charges $78 for labor
<em><u>The slope intercept form is given as:</u></em>
y = mx + c
Therefore,
total cost of the house call plus labor = 79 + 78(number of hours worked)
y = 78x + 79
Thus the equation is found
<em><u>How much does it cost if the plumber works for 6 hours?</u></em>
Substitute x = 6 hours
y = 78(6) + 79
y = 468 + 79
y = 547
Thus it costs $ 547 if the plumber works for 6 hours