ineedhelponmyhw
A line has a slope of 2 and a y-intercept of (0, -4). What is the value of y when x = 6?
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ineedhelponmyhw
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they are linear equations.
mathteacher1729
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Do you know what the slope-intercept form of a line is? If so, you can literally drop the slope, x-value, and y-intercept given in the problem right into it, then solve for y. :)
ineedhelponmyhw
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so is it..
ineedhelponmyhw
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y=2x-4 ?
mathteacher1729
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y = 2x - 4 is the equation of the line.
Now let x = 6 in the above equation and solve for y. :)
ineedhelponmyhw
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y=12-4
y=8
mathteacher1729
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You got it! :D
ineedhelponmyhw
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so i did the same thing for another problem...."A line has a slope of -2/3 and a y-intercept of (0, 3). What is the value of y when x = 4?"
ineedhelponmyhw
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i got the answer y=5.666 is this correct?