#### Equation of a curve

## What is the general equation of a curve?

IF B^{2} = A*C, the general equation represents a parabola. If B^{2} > A*C, the general equation represents a hyperbola.

## How do you find the equation of a curved line on a graph?

We can, of course, use this to find the equation of the line. Since the line crosses the y-axis when y = 3, the equation of this graph is y = ½x + 3 . To find the gradient of a curve, you must draw an accurate sketch of the curve. At the point where you need to know the gradient, draw a tangent to the curve.

## How do you find the equation of a curve using differentiation?

Equation of a tangentDifferentiate the equation of the curve.Substitute the value into the differentiated equation to find the gradient.Substitute the value into the original equation of the curve to find the y-coordinate.Substitute your point on the line and the gradient into. y − b = m ( x − a )

## What is the equation for curve of best fit?

Finding an equation of best fit in DesmosThe R-squared value is a statistical measure of how close the data are to a fitted regression line. Adjust your sliders until you get the highest possible value for R². To have Desmos create an equation of best fit, in the input bar, add a new equation y1~bx1^2+cx1+d.

## What is ellipse equation?

The standard form of the equation of an ellipse with center (0,0) and major axis parallel to the x-axis is. x2a2+y2b2=1. where. a>b. the length of the major axis is 2a.

## How do you work out the equation of a quadratic curve?

System of Equations methodUsing our general form of the quadratic, y = ax^{2} + bx + c, we substitute the known values for x and y to obtain: Substituting (−2,0):0 = a(−2)^{2} + b(−2) + c = 4a − 2b + c. Substituting (1,0):0 = a(1)^{2} + b(1) + c = a + b + c. This Wolfram|Alpha search gives the answer to my last example. c.

## Can a function be curved?

A function can only have one output, y, for each unique input, x. If a vertical line intersects a curve on an xy-plane more than once then for one value of x the curve has more than one value of y, and so, the curve does not represent a function.

## What is the equation of a parabola?

Given the focus (h,k) and the directrix y=mx+b, the equation for a parabola is (y – mx – b)^2 / (m^2 +1) = (x – h)^2 + (y – k)^2.

## How do you find the equation of a straight line?

The general equation of a straight line is y = mx + c, where m is the gradient, and y = c is the value where the line cuts the y-axis. This number c is called the intercept on the y-axis.

## What is the equation of tangent?

Recall : • A Tangent Line is a line which locally touches a curve at one and only one point. • The slope-intercept formula for a line is y = mx + b, where m is the slope of the line and b is the y-intercept. • The point-slope formula for a line is y – y1 = m (x – x1).

## How do you find the normal to a curve?

Gradient of tangent when x = 2 is 3 × 2^{2} = 12. You may also be asked to find the gradient of the normal to the curve. The normal to the curve is the line perpendicular (at right angles) to the tangent to the curve at that point. Remember, if two lines are perpendicular, the product of their gradients is -1.