Answer:
y - 7 = 1/2(x + 4)
Step-by-step explanation:
Point-Slope Form: y - y₁ = m(x - x₁)
Step 1: Define
Slope <em>m</em> = 1/2
Point (-4, 7)
Step 2: Substitute
y - 7 = 1/2(x + 4)
Answer:
Step-by-step explanation:
n = 400
Proportion p = 229/400= 0.5725
For 95% confidence interval we use Z value as 1.96
Std error = 0.025
margin of error = 1.96*0.025
Confidence interval 95% = 0.5725±Margin of error
= (0.524, 0.621)
b) When smiled x becomes 277
p = 0.6925
Std error = 0.023
Margin of error= 1.96*0.023
Confidence interval = (0.647, 0.738)
Smiling increases the chances of stopping since mean and conidence interval bounds are showing increasing trend.
Answer:
5(c+3)=85
divide both sides by 5
c+3=17
taking 3 to the other side gives us -3
c=17-3
c=14
Answer: 7.2
Step-by-step explanation: Mean= (sum of observations/number of observations)
=(5+6+6+9+10)/5
=(36)/5
=7.2
The answer can be either y = 1.5 or y = 1 1/2