Javier and Ellema both get their cars washed and fill their gas tanks at the same gas station. Javier pays $26.96 for a car wash
and 5.6 gallons of gas. Ellema pays $48.62 for a car wash and
13.2 gallons of gas.
a. What is an equation for the cost of gas and a car wash as a
function of the amount of gas bought? Show your work.

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33

answer: the answer is 110