Write an Equation of a line
Regression equations
Correlation Coefficients
Predictions
100
Write an equation with a slope of -3/2 and a y-intercept of 5.
y=-3/2x+5
100
Write the linear equation for the table below. Round to the nearest tenth.
y=-6.9x+396.9
100
What is the correlation coefficient and what does it mean for the table below.
r is -0.8, it means that there is a strong negative linear relationship between the two.
100
What would a home that is 30 years cost if you use the regression equation for the table below. Round to the nearest whole number.
A house that is 30 years old would cost $190,000.
200
Write an equation with slope -4 and passes through (-3,4) in slope-intercept form.
y=-4x-8
200
Write the regression equation for the table below.
Ignore the $200 when making your equation. Round to the nearest tenth.
y=11.9x-69.6
200
What is the correlation coefficient for the table below and what does it mean?
Ignore the $200 when finding the correlation coefficient. Round to the nearest hundredth.
r is 0.96 and it means that there is a strong positive linear relationship.
200
Use the regression equation to predict what an advertisement costing $200 would bring in for sales. Round to the nearest whole number.
A $200 advertisement would bring in $2,310 in sales.
300
Write an equation of a line that passes through (3,4) and (2,3).
y=x+1
300
Write the regression equation for the table below. Round to the nearest tenth.
y=-0.8x+94.9
300
What is the correlation coefficient for the table below and what does it mean. Round to the nearest hundredth.
r is -0.99 which means there is a strong negative linear relationship.
300
Use the regression equations to predict if you spend 35 mins exercising the minutes you spend viewing tv. Round to the nearest whole number
You would spend 75 minutes viewing tv.
400
Write the equation of the line through (3,6) and (4,6)
y=6
400
Write the regression equation for the table below.
y=1.08x-2125
400
What is the correlation coefficient and what does it mean? Round to the nearest hundredth.
r is 0.98 and it means there is a strong positive linear relationship.
400
Use the regression equation of the table below to find the year that enrollment was 45 students. Round to the nearest whole number.
In the year of 2009 there would be 45 students.
500
Write the line parallel to y=3x+5 that passes through (2,3).
y=3x-3
500
Write the regression equation for the table below. Round to 3 decimal places.
y=0.083x+1.259
500
What is the correlation coefficient for the table and what does it mean? Round to the nearest hundredth.
r is 0.98 which means there is a strong positive linear relationship
500
Use the regression equation to predict the cost of gas for the year we are in and is the true for current day.
Gas would be 3.251 which is close the cost of gas currently.