Question

Please look at the photo and let me know the three answers ASAP!! Thank you!

Answer 1

(a) $ 67.1

(b) $98.60

(c) $ 1.26

Explanation:

Given equation is

`y\:=\:-1.26x\:+\:98.6`

where x is the temperature in °F and y is the heating cost in $

To find heating cost for a specific temperature just substitute the value of x (temperature) in the equation

Part (a)
For x = 25 we get
y = -1.26(25)+ 98.6 = $ 67.1

Part (b)

For x = 0 we get
y = -1.26(0) + 98.6 = 0 + 98.6 = $98.60

Part (c)
For a 1 degree increase in temperature, the predicted decrease is the slope of the line
Slope of line = coefficient of x = -1.26

So decrease in cost for 1 degree increase in temperature = $1.26