Answer: y = -5x - 3.
Explanation:
When you know the slope and the y-intercept you can directly write the slope-intercept equation of the line.
The slope-intercept equation of the line has the form: y = mx + b, where m is the slope and b is the y-intercept.
Here you know m = -5 and b = -3, hence you just have to substitute those values in the general slope-intercept form, which is:
That equation represents the line, which means tha every point in the line will be an ordered pair of the function. For example:
x y = -5x - 3
- 10 -5(-10) - 3 = 50 - 3 = 47
0 0 - 3 = - 3 (this is the y-intercept)
10 -5(10) - 3 = - 50 - 3 = - 53
Answer: C(t)=0.2x + 8
Step-by-step explanation:
If we know that we have a charge per minute it would look like mx with m being the charge for every x (minutes being used). We also know that there is an initial charge that has to be added on, but it won't change after the charge is set so we can call this "i".
Your equation from what we already know is going to be mx + i =Total charge.
Now that we have an equation, we an plug in what we know to solve for our initial charge. We plug in 0.2 for 5 since that is the cost for minute along with 5 for x since that is the amount of minutes. We do not know the initial charge so leave that as i, and plug 9 in for Total charge.
Your new equation should look like 0.2(5) + i=9 where we can multiply .2 by 5 and get 1 and then subtract 1 from both sides. This leaves you with 8=Total charge.
Since the problem is asking for a function representing the total cost we know that it is now C(t) 0.2x +8
Answer:
Step-by-step explanation:
If the graph is a straight line, then it is linear. And If the y values is the same. The power of each, x and y in the equation is one.
