Find the initial value of the linear function, given that the rate of change is m=−4/7

, and (14,3)
is an (x,y)
value of the linear function.(1 point)
Responses

b=−5
b equals negative 5

b=12.29
b equals 12.29

b=15.71
b equals 15.71

b=11

1 answer

To find the initial value (y-intercept) of the linear function given a rate of change (slope) and a point on the line, we can use the slope-intercept form of a linear equation, which is:

\[ y = mx + b \]

Where:

  • \( m \) is the slope
  • \( b \) is the y-intercept
  • \( (x, y) \) is a point on the line

You are given:

  • \( m = -\frac{4}{7} \)
  • The point \( (14, 3) \)

We can plug these values into the equation to solve for \( b \):

\[ 3 = -\frac{4}{7}(14) + b \]

Now, calculate \( -\frac{4}{7} \times 14 \):

\[ -\frac{4}{7} \times 14 = -\frac{4 \times 14}{7} = -\frac{56}{7} = -8 \]

Now substitute that back into the equation:

\[ 3 = -8 + b \]

To solve for \( b \), add 8 to both sides:

\[ b = 3 + 8 \] \[ b = 11 \]

So the initial value (y-intercept) of the linear function is:

\[ \boxed{11} \]