Write the equation of the line that goes

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� Write the equation of the line that goes through the point (-1, 4)

� Write the equation of the line that goes through the point (-1, 4) and (2, 0)

� Write the equation parallel to the line y= ½x-1 that goes through the

� Write the equation parallel to the line y= ½x-1 that goes through the point (2, -7)

� Write the equation of the line perpendicular to the line shown.

� Write the equation of the line perpendicular to the line shown.

� Writing equations of lines �Calculate slope �Plug in point to find y-int “b”

� Writing equations of lines �Calculate slope �Plug in point to find y-int “b” � Parallel= same slope � Perpendicular= opposite reciprocal slope

� Bananas cost $0. 70 each, and peaches cost $0. 90 each. If you

� Bananas cost $0. 70 each, and peaches cost $0. 90 each. If you want to spend exactly $21. 20 at the stand you need to buy 11 bananas, how many peaches can you buy? � Let b represent the number of bananas, and p represent the number of peaches.

� Suppose that the water level of a river is 34 feet and that

� Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0. 5 foot per day. Write an equation for the water level, L, after d days. In how many days will the water level be 26 feet?

� In order to join a movie rental service, there is an initial $60

� In order to join a movie rental service, there is an initial $60 fee, then a $5 fee every month. Write an equation in slope-intercept form modeling this situation, then use it to find out how much you will have paid after 10 months of this service.

�A caterer charges $120 to cater a party for 15 people and $200 for

�A caterer charges $120 to cater a party for 15 people and $200 for 25 people. Assume that the cost, y, is a linear function of the number of x people. Write an equation in slopeintercept form for this function. What does the slope represent? How much would a party for 40 people cost?

� The Ramey family bought 4 sandwiches and 3 salads. They spent $24. Let

� The Ramey family bought 4 sandwiches and 3 salads. They spent $24. Let x be the cost of a sandwich and y be the cost of a salad. If each sandwich cost $3. 75, how much did each salad cost?

� Equations in slope intercept form �Find two data points calculate slope, y-int �One

� Equations in slope intercept form �Find two data points calculate slope, y-int �One time “fee” = b, slope/ rate of change � Equations �Two in standard form comparative quantities �Ax + by = c, where c is a sum or total

� Construct a scatter plot with line of best fit for the following data.

� Construct a scatter plot with line of best fit for the following data. Find the equation of the line of best fit. X Y 1 2 2 3 3 4 4 3 4 6 5 4 5 5 6 7

� Know difference between interpolation and extrapolation � Use equation of best fit to

� Know difference between interpolation and extrapolation � Use equation of best fit to interpolate and/or extrapolate