A few days ago
Which one of these equations passes through points (1,2) and (-1,-2)?
A) y=2x
B) y=x+1
D) y=2x+1
F) y= 2/3x +1
Top 3 Answers
A few days ago
Favorite Answer
Last person has it solved up to the last step…follow her instructions to get the slope, which eliminates options B and F (did u mean D?). now test either point (1,2) or (-1,-2) in “A” and “D”:
“D”: y = 2x + 1; y=2, x=1
2 = 2(1) + 1
2 = 2+1
2 = 3 WRONG
“A”: y = 2x; y=2, x=1
2 = 2(1)
2 = 2 CORRECT
the answer is A
0
A few days ago
Find the slope.
y2-y1/x2-x1
-2-2/-1-1
-4/-2
4/2
2/1
2
now in your equations which one has the slope of 2?
remember that the slope in y=mx + b form is always the m. Where would the line pass through on the y-intercept?
0
A few days ago
Substitute the x and y coordinates in each equation and check if the answer is the same as right hand side.
The answer is A)
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