Question

Use the graph to answer the question.

The graph shows the words per minute Minka can type. if the passes through (1,60) and (7,140)

Which is the equation of the line represented in the graph?

(1 point)
Responses

y=403x+50
y is equal to 40 thirds x plus 50

y=403x+1403
y is equal to 40 thirds x plus 140 thirds

y=3140x−72
y is equal to 3 over 140 x minus 7 halves

y=1403x+403

Answer 1

Slope m = (140 − 60)/(7 − 1) = 80/6 = 40/3.
Using point-slope with (1,60): y − 60 = (40/3)(x − 1) ⇒ y = (40/3)x + 140/3.

So the correct choice is "y is equal to 40 thirds x plus 140 thirds."