Algebra HOMEWORK HELP?! Please & thanks.
Thanks! If you answer these correctly I will love you forever. 1. If the slope of a straight line is -5 and if X (the variable on the horizontal... Show More
Most Helpful Opinion
Because, a slope of "-5" means y = -5x (plus a constant, but that is irrelevant right now).
Insert "10" to the position of x. What do you get?
y = -5(10)
y = -50
Decreases by 50.
2-) c (this time you insert the variable to y, but everything else is same)
3-) d (same tactic)
Basically, y increases by 4850 - 1730 = 3120 when x increases by 500 - 100 = 400.
If y increases by 3080 and x increases by 400, then the slope of the line is 3120 / 400 = 7.8
Meaning that the equation should look like this:
Y = 7.8C + k (k is your y-intercept - the point where the line intersects with the vertical axis - and that is not given in the question so I can't tell you what k is, but we might not need it at all.)
None of the answers have the "7.8C" expression, so the correct answer must be "e - none of the above".
What Guys Said 5
Assuming the first three questions want the new line to have the same slope as the original line:
1) the slope intercept form or formula is y= mx+b. Remember slope is rise over run. Assuming the line starts at the origin (0,0), y= -5*10+0; y= -50. m is the slope; x is the x-axis movement and y is the y-axis movement; b is the starting point for the line, normally anywhere on the y-axis.
2) Do the same thing in number 1.
3) Do the same thing in number 2.
4) y=mx+b; (y2-y1) / ( x2-x1)
If you need more help, please ask.
detailed explanation to follow
Well, I wish you and your sisters would stop blowing me off for tutoring. Maybe you'd get these right if the 3 of you came. Haha I said blowing and came.
What Girls Said 0
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