inital value and y intercept of (-3,4), (0,3),(3,2), (6,1)

5 answers

To find the initial value and y-intercept of the given points \((-3, 4)\), \((0, 3)\), \((3, 2)\), and \((6, 1)\), we first need to understand what the y-intercept means. The y-intercept is the point where the line crosses the y-axis, which occurs when \(x = 0\).

From the points provided:

  • The point \((0, 3)\) gives us the y-intercept directly as \(3\).

Thus, the y-intercept is \(3\).

Now, regarding the initial value, this term often refers to the value of a function at \(x = 0\) as well, which is also the y-intercept in linear functions.

Summary:

  • y-intercept: 3
  • Initial value at \(x = 0\): 3

If you need a linear equation that connects these points or if you need further analysis or extrapolation, please let me know!

initial value and rate of change

To find the initial value and the rate of change based on the points you provided \((-3, 4)\), \((0, 3)\), \((3, 2)\), and \((6, 1)\), we can represent the relationship between the values with a linear equation of the form \(y = mx + b\), where \(m\) is the rate of change (slope) and \(b\) is the y-intercept (initial value when \(x = 0\)).

Finding the Initial Value:

As previously mentioned, the y-intercept (initial value) from the point \((0, 3)\) is:

  • Initial Value: \(b = 3\)

Finding the Rate of Change:

To calculate the rate of change (slope \(m\)), we can pick two points from the given data. The formula to find the slope between two points \((x_1, y_1)\) and \((x_2, y_2)\) is:

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Let's use the points \((0, 3)\) and \((6, 1)\):

  • \((x_1, y_1) = (0, 3)\)
  • \((x_2, y_2) = (6, 1)\)

Calculating the slope:

\[ m = \frac{1 - 3}{6 - 0} = \frac{-2}{6} = -\frac{1}{3} \]

Summary:

  • Initial Value: 3
  • Rate of Change: \(-\frac{1}{3}\)

This means that for every unit increase in \(x\), the value of \(y\) decreases by \(\frac{1}{3}\).

A coordinate plane shows quadrant 4 with the x-axis, labeled as minutes, ranging from 0 to 6 in increments of 1 and y-axis, labeled as elevation in feet, ranging from 0 to negative 110 in decrements of 10. A ray with arrow at the bottom end points downward from the origin. The coordinates that it passes through are left parenthesis 0 comma 0 right parenthesis, left parenthesis 3 comma negative 60 right parenthesis, and left parenthesis 5 comma negative 100 right parenthesis. The graph shows the elevation of a deep-sea diver in relation to minutes passed. Using any two points on the graph, what is the rate of change in the diver’s elevation?

To find the rate of change in the diver's elevation, we can use the formula for the slope (\(m\)) between any two points on the graph. The points you've provided are:

  1. \((3, -60)\) - at 3 minutes, the elevation is -60 feet.
  2. \((5, -100)\) - at 5 minutes, the elevation is -100 feet.

Using the formula for the slope:

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Let's assign the points:

  • Point 1: \((x_1, y_1) = (3, -60)\)
  • Point 2: \((x_2, y_2) = (5, -100)\)

Now plug in the values:

\[ m = \frac{-100 - (-60)}{5 - 3} = \frac{-100 + 60}{5 - 3} = \frac{-40}{2} = -20 \]

Conclusion

The rate of change in the diver's elevation is \(-20\) feet per minute. This means that for every minute that passes, the diver's elevation decreases by 20 feet.