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Graph the line using the slope and the y-intercept, or the points. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

2015年8月4日 · Is xy = 7 a function? If x and y are related by xy = 7, the y is a function of x. Solve the equation for y. We get y = 7 x. Now ask yourself: If I choose an x, do I ever get two different numbers for y? If the answer is NO, the y is a function of x. In this case the answer IS no, so, y is a function of x. For comparison.

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To solve a system of equations by elimination, write the system of equations in standard form: ax + by = c, and multiply one or both of the equations by a constant so that the coefficients of one of the variables are opposite. Then, add or subtract the …

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Apply the product rule to xy x y. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

In this formula : y tells us how far up the line goes x tells us how far along m is the Slope or Gradient i.e. how steep the line is b is the Y-intercept i.e. where the line crosses the Y axis The X and Y intercepts and the Slope are called the line properties. We shall now graph the line x-y-7 = 0 and calculate its properties Graph of a ...

Divide each term in xy = 7 x y = 7 by x x and simplify. Tap for more steps... The given equation y = 7 x y = 7 x can not be written as y = kx y = k x, so y y doesn't vary directly with x x.