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REMEMBER! Type data tables in STAT EDIT. Use 4:LinReg(ax+b) for line of best fit Use 5:QuadReg for curve or quadratic of best fit Mrs. Hall looked at gas prices for the last 3 years. What is the line of best fit for the equation above? y = 0.235x + 3.68 y = 0.235x + 3.25 y = 0.235x + 3.14 y = 0.235x + 2.96 Based on your line of best fit, what will be the price of gas in 50 years (Hint: year 53)? Mrs. Hall looked at gas prices for the last 3 years. $12.75 $14.23 $15.42 $17.99 Write an equation for the line of best fit. The chart below compares the total calories of a sandwich based on the total fat in the sandwich. y = 13.138x +159.88 y = 13.138x +144.73 y = 13.138x +98.79 y = 13.138x +110.11 Based on your equation, how many total calories would a crispy chicken sandwich have at 25 grams of fat? The chart below compares the total calories of a sandwich based on the total fat in the sandwich. 432 456 507 473 The distance a marble has traveled down a slanted board was measured by a 3rd grade class. What is the quadratic curve of best fit? y = .5 - 0.06x - 0.03 y = .5x2 + 0.06x + 0.03 y = .5x2 - 0.06x + 0.03 y = .5x2 + 0.06x - 0.03 The distance a marble has traveled down a slanted board was measured by a 3rd grade class. Based on the curve of best fit, estimate the distance the marble will travel in 20 seconds. 152 175 199 215 Bomani's math club has been fundraising to prepare for the upcoming Science Meets Math demonstration. What is the equation for the line of best fit? y = 17.27x + 23.255 y = 17.27x + 25.181 y = 17.27x + 27.893 y = 17.27x + 30.112 Bomani's math club has been fundraising to prepare for the upcoming Science Meets Math demonstration. Based on the equation, how much money will they have saved at week 12? $175.40 $163.25 $197.55 $230.50 The average hourly wage for a technical worker over a 10-year period is shown belox. What is the quadratic curve of best fit for the information? y = 0.002x2 + 1.246x + 5.633 y = 0.002x2 + 1.246x + 8.279 y = 0.002x2 + 1.246x + 10.675 y = 0.002x2 + 1.246x + 13.772 The average hourly wage for a technical worker over a 10-year period is shown belox. Based on the curve of best fit, estimate the hourly wage of the worker at 20 years. $25.25 $28.17 $34.12 $36.40 |