Your class is given a real-world scenario of a linear function in which the rate of change is -3 and the initial value is -10. You wrote the equation y=-3x+(-10) to represent the function. Your classmate wrote y=-3x-10. Who is correct? Choose the correct answer and justification.
A) Both are correct; The properties of operations show that both are correct. Subtracting 10 is the same as adding the additive in- verse of 10.
B) Neither are correct; The slope and y-intercept need to be switched. The correct equation is y=-10x-3.
C) You are correct; Since the slope-intercept form of a linear equation is y=mx+b , there needs to be an addition sign in the equation.
D) Your classmate is correct; Since the initial value is -10, this is the value that should be included in the slope-intercept form of the equation.
