Did I answer this math question correctly?

Question

The question was:

An amusement park charges $12.00 for admission and $3.00 per ride. Write an equation for the relationship between the total cost y and the number of rides x. What is the y-intercept?

Well, I'm not sure how to write an equation, but I got 15 for the y-intercept because $12+$3=$15. Is it right? And what equation should I write?

Thank you =D

Answer 1

Hmmmm...

y (total cost) = 12 dollars + 3 dollars * x (number of rides)

y = $12 + $3x

The y-intercept is at x = 0;
when x = 0, y-intercept = $12

Answer 2

The y-intercept is the point on the y-axis that the line crosses. In other words when x is zero, what is y?

x is the number of rides. y is the total cost at the park. If you got into the park it costs $12.00 for admission. If you don't do any rides (x=0) the total cost is $12.00. So the y intercept is 12.

The equation for a line looks like y=mx+b. m=slope, b=intercept

In this case y = 3 x + 12. $3 per ride + $12 admission.

Answer 3

Yes the equation is y=3x+12, so the slope is 3, but the y-intercept is 12 (just put x=0 in the equation, giving you the cost of admission and zero rides).

Answer 4

you have the idea of the equation correct, now you need to plug in the variables given in the problem. Since 3$ is the cost per ride, you add an X next to it to multiply and since 15$ is the total cost, then you replace it with a y. So your equation looks like this:
$12+3x=y.
Now the next part is a little shady in my head. If you take that equation and start plotting x and y with new numbers in the variables, then the dot will be on the y axis at 12 when x equals 0. So I believe that the y intercept is y=12.

Answer 5

$12+$3x=$Y.

If you only go on one ride then, yes, $15 is correct. But you need the X with the three so if more rides are added to it, you can change the amount.

Answer 6

3x+12=y