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The problems you missed are listed below with answers / explanations.  Look over the explanation for each problem so you can understand why you missed it!

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'); resetdisplay(); for(var i = 0; i <10; i++) { ganswer[i] = prompt(question[i],""); if (ganswer[i] == "quit" || ganswer[i] == "QUIT" || ganswer[i] == "Quit") { break; } q++; if (ganswer[i] == answer[i]) { c++; } else { rightans[i] = 0; w++; } resetdisplay(); } for(var i = 0; i < 10; i++) { if (rightans[i] == 0) { expl = expl + explain[i]; } } parent.frames[0].document.write(expl); parent.frames[0].document.write("
"); } question[0] = 'Write the slope-intercept form for graphing lines'; question[1] = 'Give the slope for y=2x+10'; question[2] = 'What is the y-intercept of y=7x+5'; question[3] = 'What is the y-intercept of y=10x+(1/2)'; question[4] = 'What is the slope of y=100x+1'; question[5] = 'What is the slope of y=89x+8'; question[6] = 'What is the slope of y=79x+90'; question[7] = 'What is the y-intercept of y=56x-78'; question[8] = 'What is the slope of y=mx+56'; question[9] = 'What is the y-intercept of y=50x+b'; answer[0] = 'y=mx+b'; answer[1] = '2'; answer[2] = '5'; answer[3] = '1/2'; answer[4] = '100'; answer[5] = '89'; answer[6] = '79'; answer[7] = '-78'; answer[8] = 'm'; answer[9] = 'b'; explain[0] = '#1

y=mx+b
is the slope-intercept form for the equation for a line.

'; explain[1] = '#2

y=mx+b
m is the slope
y=2x+10
The slope is 2

'; explain[2] = '#3

y=mx+b
b is the y-intercept
y=7x+5
The y-intercept is 5

'; explain[3] = '#4

y=mx+b
b is the y-intercept
y=10x+(1/2)
1/2 is the y-intercept

'; explain[4] = '#5

y=mx+b
m is the slope
y=100x+1
The slope is 100

'; explain[5] = '#6

y=mx+b
m is the slope
y=89x+8
The slope is 89

'; explain[6] = '#7

y=mx+b
m is the slope
y=79x+90
The slope is 79

'; explain[7] = '#8

y=mx+b
b is the y-intercept
y=56x-78
-78 is the y-intercept

'; explain[8] = '#9

y=mx+b
m is the slope
y=mx+56
The slope is m

'; explain[9] = '#10

y=mx+b
b is the y-intercept
y=50x+b
b is the y-intercept

'; rightans[0] = 1; rightans[1] = 1; rightans[2] = 1; rightans[3] = 1; rightans[4] = 1; rightans[5] = 1; rightans[6] = 1; rightans[7] = 1; rightans[8] = 1; rightans[9] = 1; //-->