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ineedhelponmyhw

  • 3 years ago

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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  1. ineedhelponmyhw
    • 3 years ago
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    they are linear equations.

  2. mathteacher1729
    • 3 years ago
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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. :)

  3. ineedhelponmyhw
    • 3 years ago
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    so is it..

  4. ineedhelponmyhw
    • 3 years ago
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    y=2x-4 ?

  5. mathteacher1729
    • 3 years ago
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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. :)

  6. ineedhelponmyhw
    • 3 years ago
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    y=12-4 y=8

  7. mathteacher1729
    • 3 years ago
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    You got it! :D

  8. ineedhelponmyhw
    • 3 years ago
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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?"

  9. ineedhelponmyhw
    • 3 years ago
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    i got the answer y=5.666 is this correct?

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