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Talking about graphing linear equations, I’m stuck, for example a problem like this y = 2x - 4 I know you substitute the x with a number but?

Science & Mathematics by Anonymous 2018-06-11 04:55:36

Social Science

Talking about graphing linear equations, I’m stuck, for example a problem like this y = 2x - 4 I know you substitute the x with a number but?

3 answers

  • Anonymous

    Let x be the number, then (x+2)^2-3x=60 x^2+4x+4-3x-60=0 x^2+x-56=0 (x+8)(x-7)=0 x=-8 or x=7 Ans. the number may be 7 or -8

  • Anonymous

    Find values of y for different x values. Say 10 in total. On x-y plot plot these numbers. You must get a straight line. This is called as the linear plot.

  • Anonymous

    y = 2x - 4 is equation of a straight line. Two points on line are (0 , - 4) and ( 2 , 0) Plot these two points and draw a straight line thro` them.

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