Math Problem Statement

Find the equation of the linear function represented by the table below in slope-intercept form. | x | y | |----|----| | -1 | 3 | | 1 | 5 | | 3 | 7 | | 5 | 9 |

Solution

To find the equation of the linear function in slope-intercept form, we need to determine the slope mm and the y-intercept bb from the given table.

The slope-intercept form of a line is: y=mx+by = mx + b

We calculate the slope mm using two points from the table. Let's take the points (1,3)(-1, 3) and (1,5)(1, 5).

The formula for the slope is: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Substitute the values: m=531(1)=22=1m = \frac{5 - 3}{1 - (-1)} = \frac{2}{2} = 1 So, the slope m=1m = 1.

Now, to find the y-intercept bb, we use one of the points and the slope we just found. Let's use the point (1,5)(1, 5). Substitute into the slope-intercept form: 5=1(1)+b5 = 1(1) + b 5=1+b5 = 1 + b b=4b = 4

Thus, the equation of the linear function is: y=x+4y = x + 4

Would you like more details or have any questions? Here are some related questions:

  1. How can we verify the equation with other points in the table?
  2. What happens if we use different points to calculate the slope?
  3. How would the equation change if the slope were negative?
  4. Can we derive the equation using the point-slope form instead?
  5. How does the equation change if the table represents a different type of function?

Tip: Always double-check by substituting other points into your equation to ensure accuracy.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Slope-Intercept Form

Formulas

y = mx + b
Slope formula: m = (y2 - y1) / (x2 - x1)

Theorems

-

Suitable Grade Level

Grades 8-10