Identify the Correct Equation: Linking Values in X: -3 to 1 and Y: 0 to 4

Question

Which of the following equations corresponds to the function represented in the table?

XY-3-2-10101234

Video Solution

Solution Steps

00:00 Find the appropriate equation for the function in the table
00:03 We want to find the slope of the graph
00:07 We'll use the formula to find the function's graph slope
00:12 We'll substitute appropriate values according to the data and solve to find the slope
00:18 This is the slope of the graph
00:23 Let's take a point on the graph
00:27 We'll use the line equation
00:32 We'll substitute appropriate values and solve for B
00:40 This is the value of B (Y-axis intersection point)
00:47 We'll construct the line equation using the values we found
00:53 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we will find the linear equation that represents the function in the table by determining the slope and y-intercept.

  • Step 1: Calculate the slope mm.
    Between two points (3,0)(-3, 0) and 2,1-2, 1, the slope is:
    m=102(3)=11=1 m = \frac{1 - 0}{-2 - (-3)} = \frac{1}{1} = 1
  • Step 2: Use the slope and a point to find the y-intercept bb.
    Using the point (3,0)(-3, 0) and the formula y=mx+by = mx + b, plug in the values:
    0=1(3)+b 0 = 1(-3) + b
    0=3+b 0 = -3 + b
    b=3 b = 3
  • Step 3: Write the equation of the line:
    y=x+3 y = x + 3

This linear equation must be consistent with all the points in the table, which it is:

  • X=2X = -2, Y=1Y = 1: 1+3=41 + 3 = 4, so correct.
  • X=1X = -1, Y=2Y = 2: 2+3=52 + 3 = 5, so correct.
  • X=0X = 0, Y=3Y = 3: 33, so correct.
  • X=1X = 1, Y=4Y = 4: 4+3=74 + 3 = 7, so correct.

The calculated equation, y=x+3 y = x + 3 , matches the option given as Choice 4.

Therefore, the function that corresponds to the table is y=x+3 y = x + 3 .

Answer

y=x+3 y=x+3