Determine the exponential regression of the data below using either a calculator or spreadsheet program. Then, estimate the x value when the y value is 5.2. Round your answer to one decimal place.   (−4.7,10.7),(−7.8,20.6),(−10.5,30.2),(−15.6,41),(−20.8,56.1),(−22,65.1)

The percent of high school students who smoked cigarettes on 1 or more of the 30 days preceding the survey is given by y = -0.064x² +0.277x +33.715, where x is the number of years after 1990. During what years from 1990 on is the percent greater than 30%? From to the percent is greater than 30%. (Round up to the nearest year as needed.)

The exposure index If tor 4.35 milieter camera is a mensurernent of the amount. of light nat his the firm. I Is determined by the equation, ET - 1o% ( 4), where fie the -7-stop? seting on the camera, and t is the exposure time in seconds. Suppose the t. stop setting is 16 and the desired exposure time is 2 seconds. What wil the the resulting exposure index beg

to the right of z= -2.17

A trendline is given to depict enrollment at a local college where x is the year and y represents enrollment. Y=178.09x-353194 Use the rrendline ro estimate the enrollment for 2009. Round to the nearest whole number.

Carol is studying the aggresive behavior in children and how often they watch TV shows about helping others.   She calculated that r = -2.9.  Which of the following would be most accurate.     A.the relationship is negative. B. none of the above. C. the relationship is strong and negative. D. the relationship is weak and negative.