Answer:
![y=8.25x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/xfwt3my7omso5oq667nltkik4glyszxuhk.png)
Explanation:
let x represent the number of hours Steven babysits
and y represent the amount he changes
Steven earns extra money babysitting. he changes $33.00 for 4 hours
so, we get
![x_1=4,y_1=33](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9v4bht9oqdrdx45h1z181k6tj1kujnt79d.png)
$49.50 for 6 hour
so, we get
![x_2=6,y_2=49.50](https://img.qammunity.org/2020/formulas/mathematics/middle-school/i6qbfdpu7vy0v0x5nhm1ik270ejbknldry.png)
Firstly, we can find slope
![m=(y_2-y_1)/(x_2-x_1)](https://img.qammunity.org/2020/formulas/mathematics/high-school/pj0y5tg37a7a9ase0auiwe687ez8iaw2vl.png)
now, we can plug values
![m=(49.50-33)/(6-4)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/pj7kd9ul8b8rh2l5o1a4e9tv78cz1124dg.png)
![m=8.25](https://img.qammunity.org/2020/formulas/mathematics/middle-school/j25ifcavulygibqniy976ysm50973fqvqr.png)
now, we can use point slope form of line
![y-y_1=m(x-x_1)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/lwv5ftdd36i4idvu50qxfdgwxhdby4wlt5.png)
now, we can plug values
![y-33=8.25(x-4)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/lvb0aomh1xergt1y8alxs7d4njta0mf5v3.png)
now, we can solve for y
![y-33=8.25x-8.25* 4](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1gvltu5pga4934ykq9kv0ciqpv56kkue66.png)
![y-33=8.25x-33](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6ooqpfb6abvtmu7h5w2m9gm3umgmwddtjz.png)
we can add both sides by 33
![y-33+33=8.25x-33+33](https://img.qammunity.org/2020/formulas/mathematics/middle-school/c6uvqf70e8bz65whvs0inpe8q2bpzhugee.png)
so, we get
![y=8.25x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/xfwt3my7omso5oq667nltkik4glyszxuhk.png)