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Would parta be f(x) = 90-4x?
you are correct
you can also write that as f(x) = -4x + 90
Thank you! And can I have some help with part B? Im a little confused, I know the slope is -4 but I dont understand the question
the slope of -4 means that as x increases by 1, y decreases by 4 slope = (change in y)/(change in x) = (-4)/(1) = -4
in this specific context, the slope means "for every additional hour of playing video games, the test score decreases by 4"
what does the y-intercept represent?
y-intercept f(x)=90-4x 0=90-4x x=90/4
that's the x-intercept
to find the y-intercept you plug in x = 0 and evaluate
Thank you for trying to explain this to me! I dont really understand it so Im going to ask my teacher for a tutoring session, thank you again
y = -4x + 90 y = -4(0) + 90 ... replace x with 0 y = 0 + 90 y = 90 so the y-intercept is 90
what does this mean? it means that if you don't play any video games at all, the score you get is 90. In a sense, this is like the starting value.
Ohhh, ok, gosh...that was simple... I appreciate it so much