The graph of a linear function is shown on the grid. plotted points are Y 11,12 X -4, -3

Which equation is best represented by this graph?.

1 answer

To determine the equation of the linear function represented by the points \( (X, Y) = (-4, 11) \) and \( (-3, 12) \), we can first find the slope of the line. The slope \( m \) is calculated using the formula:

\[ m = \frac{Y_2 - Y_1}{X_2 - X_1} \]

Using the points \( (-4, 11) \) as \( (X_1, Y_1) \) and \( (-3, 12) \) as \( (X_2, Y_2) \):

\[ m = \frac{12 - 11}{-3 - (-4)} = \frac{1}{1} = 1 \]

The slope \( m \) is \( 1 \).

Next, we can use the point-slope form of the linear equation, which is:

\[ Y - Y_1 = m(X - X_1) \]

Using the point \( (-4, 11) \):

\[ Y - 11 = 1(X - (-4)) \]

This simplifies to:

\[ Y - 11 = X + 4 \]

Adding 11 to both sides:

\[ Y = X + 15 \]

Thus, the equation of the line is:

\[ Y = X + 15 \]

This is the best representation of the linear function based on the plotted points.