Question

Help with math please, don’t understand

Answer 1

y=-1110 x +14220

Explanation:

We need two points to establish a linear equation.

The statement says that 'y' variable is the prize of the automobile in year x.

Considering that year 1993 as x=0, this means also that year 1997 is x=4.

By the statement we also know that when x=0, y=14220, and when x=4, y=9780

We can now write the equation of our line.

Remember: lines has the following general equation.

y=mx=b

Where m is the slope and b a point of interception with 'y'-axis.

If we evaluate the point (0,14220) in the expression we have this:

14220=b.

Now we need to find the slope using the following equation:

`m=(y_(2)-y_(1))/(x_(2)-x_(1))`

where (x1,y1)= (0,14220) and (x2,y2)=(4, 9780)

We have m= -1110

y=-1110x +14220