Question

y=10 is how much you get a week for your allowance and x is how much you get payed a week her is my table x(week) y(money)( 0,0)( 1 ,10)( 2 ,20) (3, 30) what i need help on is this Write the function rule based on your table of values. Graph each of your functions on the coordinate plane. can u guys show me how on this first one so i could do the other one on my own thanks so much

Answer 1

When x = 0, y is y = 0

When x = 1, y is y = 10

So the slope is (change in y)/(change in x) = (10-0)/(1-0) = 10

So y = mx+b becomes y = 10x+b

We know that when x = 0, y = 0, so plug these values in to get

y =10x+b

0 = 10(0) + b

0 = 0 + b

0 = b

b = 0

So the function is y = 10x which you can write as f(x) = 10x

Answer 2

so what does mx+b

Answer 3

so from there i dont get it

Answer 4

y = 10x is in the form y = mx+b where m = 10 and b = 0

Answer 5

Does that make sense?

Answer 6

what is the b

Answer 7

b = 0, which is the y-intercept

Answer 8

So this means that the y-intercept is (0,0)

Answer 9

thanks

Answer 10

you're welcome

Answer 11

so f(x) = 10x is that the answer to this question

Answer 12

yes, that's the function that represents this idea

Answer 13

lol thanks

Answer 14

yw

Answer 15

also do u know how to graph it could u show me how to do it

Answer 16

do you know how to plot points in a coordinate system?

Answer 17

ya a little

Answer 18

To graph, you just plot two points, say (0,0) and (1,10). Then you draw a straight line through them to graph the line.

Answer 19

ok thanks

Answer 20

sure thing