Question

A line passes through the points(5,22) and (8,25) Write a linear function rule in terms of x and y for this line. The linear function rule is y = _____________

Answer 1

SOLUTION

Set the function equal to zero to solve for x.

{
0
=
1
2
x
−
3
3
=
1
2
x
6
=
x
x
=
6

​⎩
​⎪
​⎪
​⎪
​⎪
​⎪
​⎨
​⎪
​⎪
​⎪
​⎪
​⎪
​⎧
​​
​0=
​2
​
​1
​​ x−3
​3=
​2
​
​1
​​ x
​6=x
​x=6
​​
The graph crosses the x-axis at the point (6, 0).

Answer is The constant x-value is 7, so the equation is x = 7.