hiro and lisa are photographers. they take pictures of seniors for high school yearbooks. they charge a stander fee for taking the pictures. there's also a change for each sets of prints determines the cost

sets of prints : total cost:
0 $30
1 $50
2 $70
3 $90

let s stand for the sets of prints ordered. write the ruel that describes a students total cost.

Question

hiro and lisa are photographers. they take pictures of seniors for high school yearbooks. they charge a stander fee for taking  the pictures. there's also a change for each sets of prints determines the cost

sets of prints :             total cost:
0                                   $30 
1                                   $50
2                                   $70
3                                   $90

let s stand for the sets of prints ordered. write the ruel that describes a students total cost.

anonymous · Answer

@Conqueror can you please help me with this question?

conqueror · Answer

o_o

@iGreen.

anonymous · Answer

Oh, I think it wants you to write an equation.

anonymous · Answer

What's 50 - 30? @itsdaniela

anonymous · Answer

The total cost @iGreen. And yes I need help writing an equation @Conqueror

anonymous · Answer

Yes, can you tell me what 50 - 30 is?

anonymous · Answer

oh lol 20 @iGreen.

anonymous · Answer

Yes, the total cost keeps increasing by 20.

anonymous · Answer

And the y-intercept is 30, because we are given the point (0, 30).

So we can write the equation:

$s = 20a + 30$

anonymous · Answer

Thank you so much! @iGreen.

anonymous · Answer

No problem.