Could someone please help me with this question ?? thank you !

Question

Could someone please help me with this question ?? thank you ! <3

anonymous · Answer

attachment

anonymous · Answer

I believe the answers to be 140 and 115 , but last time i answered this question ( a different version ) the answers were something completely different from what I previously thought :(

campbell_st · Answer

well if the plumber has zero hours... 

y = 55(0) + 85     the value represents the callout fee or y-intercept

so if you subtract the call out fee for the cost for 1 hour... what would the 
plumber charge..?

to check look at the cost for 2 hours... subtract the callout fee... is this answer
double the previous...?

hope it makes sense

anonymous · Answer

I think the answer for the plumber would be 25 then ?

campbell_st · Answer

ummm no

reading the equation 

y = 55x + 85

if x = 0 what is the cost y...?

anonymous · Answer

It would be 85 then

campbell_st · Answer

great so that is the call out fee is $85

now if the plumber works 1 hour... he will charge 

$$y = 55 \times1 + 85$$

cost = $140

so what was the plumber's hourly rate... use the cost for 1 hour and subtract $85

anonymous · Answer

55 ?

campbell_st · Answer

great so the plumber charges $55 per hour...

campbell_st · Answer

look at the table, its the electrician... the increase each out is the hourly fee... 

so   1 hour = 115     2 hours = 180... what does it go up by..?

anonymous · Answer

65 ?

campbell_st · Answer

great that is the electricians hourly fee

if you subtract 65 from the cost for 1 hour you get $50 as the call out fee

so the equation is 

y = 65x + 50

so in both cases... the slope of the line is the hourly fee and the y-intercept is the call out fee. 

hope it helps.

anonymous · Answer

so these are the correct answers ?

campbell_st · Answer

yes... they would be my answer

anonymous · Answer

Thank you ! :)