Asked by taylor
What is y intercept of equation represented:
X Y
150 1047
125 872
100 697
75 522
a. -3
b. 0
c. 3
d. 172
I come up with totally different answers than these. Do you use the y2-y1/×2-×1 ?
X Y
150 1047
125 872
100 697
75 522
a. -3
b. 0
c. 3
d. 172
I come up with totally different answers than these. Do you use the y2-y1/×2-×1 ?
Answers
Answered by
Reiny
Use the last two points to find the equation
slope = (697-522)/(100-75) = 175/25 = 7
so we have
y = 7x + b
sub in (75,522)
522 = 7(75) + b
b = -3
so we have y = 7x - 3
From your knowledge of y = mx + b, what do you think?
slope = (697-522)/(100-75) = 175/25 = 7
so we have
y = 7x + b
sub in (75,522)
522 = 7(75) + b
b = -3
so we have y = 7x - 3
From your knowledge of y = mx + b, what do you think?
Answered by
taylor
Thanks, could get 7 , but didn't know what to do after...
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