ALGEBRA 1 CUMULATIVE EXAM WITH
CORRECT ANSWERS
Which yfunction yrepresents yexponential ygrowth? y- ycorrect yanswers y-f(x) y= y3^x
Which yfunction yrepresents yexponential ydecay? y- ycorrect yanswers y-f(x) y= y4(2/3)^x
The ydepth yof ysnow yafter yn yhours yof ya ysnowstorm yis yrepresented yby ythe yfunction
yf(n y+ y1) y= yf(n) y+ y0.8 ywhere yf(0) y= y2.5. yWhich ystatement ydescribes ythe
ysequence yof ynumbers ygenerated yby ythe yfunction? y- ycorrect yanswers y-The ydepth
yof ysnow ywas y2.5 yinches ywhen ythe ystorm ybegan, yand yincreased yby y0.8 yinches
yeach yhour.
Last yweek, yLindsay yearned y$10 yper yhour yplus ya y$60 ybonus yfor ygood yjob
yperformance. yShe yspends yof yher ypaycheck yon ydinner ywith yfriends. yIf yshe yhad
ynot yearned ythe ybonus, ythe yamount yshe yspent yon ydinner ywould yhave ybeen yof
yher ypaycheck. yWhich yequation ycan ybe yused yto yfind yh, ythe ynumber yof yhours
yLindsay yworked ylast yweek? y- ycorrect yanswers y-1/15(10h y+ y60) y= y1/10(10h)
CORRECT ANSWERS
Which yfunction yrepresents yexponential ygrowth? y- ycorrect yanswers y-f(x) y= y3^x
Which yfunction yrepresents yexponential ydecay? y- ycorrect yanswers y-f(x) y= y4(2/3)^x
The ydepth yof ysnow yafter yn yhours yof ya ysnowstorm yis yrepresented yby ythe yfunction
yf(n y+ y1) y= yf(n) y+ y0.8 ywhere yf(0) y= y2.5. yWhich ystatement ydescribes ythe
ysequence yof ynumbers ygenerated yby ythe yfunction? y- ycorrect yanswers y-The ydepth
yof ysnow ywas y2.5 yinches ywhen ythe ystorm ybegan, yand yincreased yby y0.8 yinches
yeach yhour.
Last yweek, yLindsay yearned y$10 yper yhour yplus ya y$60 ybonus yfor ygood yjob
yperformance. yShe yspends yof yher ypaycheck yon ydinner ywith yfriends. yIf yshe yhad
ynot yearned ythe ybonus, ythe yamount yshe yspent yon ydinner ywould yhave ybeen yof
yher ypaycheck. yWhich yequation ycan ybe yused yto yfind yh, ythe ynumber yof yhours
yLindsay yworked ylast yweek? y- ycorrect yanswers y-1/15(10h y+ y60) y= y1/10(10h)
