Answer:
1st one, I think so. I'm pretty positive
Answer:
y=0.79x+27
Step-by-step explanation:
y is total cost and 0.79is per mile cost last is 27
so is y=0.79x+27
Answer:
16
Step-by-step explanation:
divide 4 by .25 (or 1/4) and you get 16
Answer:
2.0
Step-by-step explanation:
x = age
y = average systolic blood pressure
x₁ = 40 years old, y₁ = 110 systolic blood pressure
x₂ = 50 years old, y₂ = 130 systolic blood pressure

∴ Slope of the regression line is 2.0
Answer:
x=1 1/18
Step-by-step explanation:
7(x+8)+4=-11(x-8)-9
distribute- 7x+56+4=-11x-88-9
7x+60=-11x+79
subtract 60 from both sides (60),(79)
7x=-11x+19
add 11x on both sides
18x/18 and 19/18
which gives you x=1 1/18 or 19/18