Math Problem Statement

Find the equation of the linear function represented by the table below in slope-intercept form.

Solution

To find the equation of the linear function from the table, we can use the slope-intercept form, which is:

y=mx+by = mx + b

Where:

  • mm is the slope of the line,
  • bb is the y-intercept.

Step 1: Calculate the slope (mm)

The slope of a line is given by:

m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

We can pick any two points from the table to calculate the slope. Let’s choose the points (x1,y1)=(1,6)(x_1, y_1) = (-1, -6) and (x2,y2)=(1,4)(x_2, y_2) = (1, 4).

m=4(6)1(1)=4+61+1=102=5m = \frac{4 - (-6)}{1 - (-1)} = \frac{4 + 6}{1 + 1} = \frac{10}{2} = 5

So, the slope m=5m = 5.

Step 2: Find the y-intercept (bb)

Now that we have the slope, we can substitute m=5m = 5 and any point from the table into the slope-intercept form to find bb. Let's use the point (1,4)(1, 4).

y=mx+by = mx + b 4=5(1)+b4 = 5(1) + b 4=5+b4 = 5 + b b=45=1b = 4 - 5 = -1

Step 3: Write the equation

The equation of the line is:

y=5x1y = 5x - 1

This is the equation of the linear function in slope-intercept form.

Let me know if you need more details, or if you'd like help with further problems!


Here are 5 related questions to explore further:

  1. How do you find the slope if given only one point and the equation of a line?
  2. Can you find the equation of a line if you know the slope and one point?
  3. How would the equation change if the slope were negative?
  4. What is the geometric interpretation of the y-intercept on a graph?
  5. How do you convert the equation from slope-intercept form to standard form?

Tip: Always check your slope using two different pairs of points to ensure consistency in calculations.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Slope-Intercept Form

Formulas

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

Theorems

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Suitable Grade Level

Grades 8-10