Answer:
$132
Step-by-step explanation:
[] First, we will set up an equation for Ross.
-> We will use slope-intercept form (see attached)
-> The slope:
[tex]\frac{y_{2} -y_{1}}{x_{2} -x_{1} }[/tex] = [tex]\frac{81-40.5}{6-3}[/tex]=[tex]\frac{40.5}{3}[/tex]=13.5
-> The y-intercept:
y = 13.5x + b
(81) = 13.5(6) + b
81 = 81 + b
0 = b
-> Final equation:
y = 13.5x
-> For 8 hours, we will plug in 8 as the x.
y= 13.5(8)
y = $108
[] Joey earns 3 dollars more,
y = (13.5 + 3)x
-> Now we will plug 8 into the equation as x,
y = $132
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather
