NotSoSuper Posted March 13, 2011 Share Posted March 13, 2011 this is my son's hw and i completely forgot how to do all of this, if someone could give me the correct answers id really appreicate it 2. A hang glider takes off from an 800-ft cliff. After 5 minutes he is at an altitude of 500 ft. A. Determine the rate of change B. Write a linear equation to model the situation 3. Rewrite -3x+6y=12 in slope intercept form Link to comment Share on other sites More sharing options...

sportjunkie07 Posted March 13, 2011 Share Posted March 13, 2011 haha good try.. son's hw. thats hillarious Link to comment Share on other sites More sharing options...

skinfan2k Posted March 13, 2011 Share Posted March 13, 2011 Rate of Change 60 ft/sec Linear Equation i believe y = 800 - 60x y= 2+ .5x Link to comment Share on other sites More sharing options...

Slacky McSlackAss Posted March 13, 2011 Share Posted March 13, 2011 a) ROC = (initial - final)/(time) see 3) 3) linear form is y=ax+b where a and b are constants Now do some of the work yourself. Link to comment Share on other sites More sharing options...

NotSoSuper Posted March 13, 2011 Author Share Posted March 13, 2011 isnt slope intercept y=mx+b Link to comment Share on other sites More sharing options...

JMS Posted March 13, 2011 Share Posted March 13, 2011 this is my son's hw and i completely forgot how to do all of this, if someone could give me the correct answers id really appreicate it2. A hang glider takes off from an 800-ft cliff. After 5 minutes he is at an altitude of 500 ft. A. Determine the rate of change B. Write a linear equation to model the situation 3. Rewrite -3x+6y=12 in slope intercept form Awsome, 10th grade math... a.) Determine the rate of change... 800ft - 500ft = (-)300 ft/ 5 min 300 ft/ 5 min x 12 (5 minute periods in 1 hour) = -720 ft / hour or 300 ft/ 5 min div 300 (seconds in 5 minutes) = .2 ft / second Write a linear equation to model the situation? y = -300/800x + 0 c:) Rewrite in slope intercept form.. Y= -.5x+2 Link to comment Share on other sites More sharing options...

G.A.C.O.L.B. Posted March 13, 2011 Share Posted March 13, 2011 Rate of Change 60 ft/secLinear Equation i believe y = 800 - 60x y= 2+ .5x Pretty sure 60 ft/sec would put him somewhere near the center of the Earth after starting at an altitude of 800 feet. Would it be 60 ft/min or 1/sec? I fail at math so maybe I'm completely wrong. Link to comment Share on other sites More sharing options...

skinfan2k Posted March 13, 2011 Share Posted March 13, 2011 Pretty sure 60 ft/sec would put him somewhere near the center of the Earth after starting at an altitude of 800 feet. Would it be 60 ft/min or 1/sec? I fail at math so maybe I'm completely wrong. thats what i mean lol Link to comment Share on other sites More sharing options...

NotSoSuper Posted March 13, 2011 Author Share Posted March 13, 2011 Awsome, 10th grade math...a.) Determine the rate of change... 800ft - 500ft = (-)300 ft/ 5 min 300 ft/ 5 min x 12 = -720 ft / hour or 300 ft/ 5 min div 300 sec = 1 ft / second Write a linear equation to model the situation? y = -300/800x + 0 c:) Rewrite in slope intercept form.. Y= -.5x+2 Howd you get that Link to comment Share on other sites More sharing options...

JMS Posted March 13, 2011 Share Posted March 13, 2011 isnt slope intercept y=mx+b y=mx+b is the formula of a line where M = slope ( rise over run) Y/X and b = the y value were x = 0. ---------- Post added March-13th-2011 at 07:24 PM ---------- Howd you get that Which one? took me a couple of tries because my eyes are so bad the plus button on the calculator looked a division button... . ---------- Post added March-13th-2011 at 07:35 PM ---------- I booted my line theory.... 2. A hang glider takes off from an 800-ft cliff. After 5 minutes he is at an altitude of 500 ft. If Y is given in feet and X is given in seconds.. then the slope is -.2/1 or -.2 So my revised line theory would be.. Y = -.2x + 800 When x = 0... the hang glider is at 800 feet right? The problem is you should use feet for both x and y but you don't have anything on the x coordinate except 5 minutes.. Link to comment Share on other sites More sharing options...

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