Y = m x + b , where m is the slope. The slope is the rise over the run or the change in x ( rooms cleaned ) over the change in y ( cost ).
125 = m * 1 + b
175 = m * 2 + b
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b = 125 - m
175 = 2 m + 125 - m
m = 175 - 125
m = 50 ( the rate of change ), b = 75
The formula is: y = 50 x + 75
It means that the starting cost will be $75 and that for every room cleaned, the cost will rise for $50.
I think the answer is the first one
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation: (2,-3) & 9(4,3)
<u>Y2 - Y1</u>
X2 - X1
<u>3 - -3</u>
4 - 2
= <u>6</u>
2
(simplified): = <u>3</u>
1
I think its 2 i hope its right