Someone help please, i cant solve this one :|

Mathematics

2 answers:

Nataly_w [17]3 years ago

5 0

Answer:

A. y = 45.25x + 10

Step-by-step explanation:

We can use the points (3, 145.75) and (5, 236.25) to solve.

Find the slope using the formula [ y2-y1/x2-x1 ].

236.25-145.75/5-3

90.5/2

45.25

Find the y-intercept using the formula for slope-intercept form [ y = mx + b ]

y = 45.25x + b

145.75 = 45.25(3) + b

145.75 = 135.75 + b

10 = b

Put everything we solved for into the formula above.

y = 45.25x + 10

Best of Luck!

andrey2020 [161]3 years ago

4 0

Answer:

i think its B

Step-by-step explanation:

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You go to an arcade and purchase a card with game credits. After playing 5 games you have 33 credits left. You play 4 more games

Amanda [17]

Answer:

$y=-3x+48$

Step-by-step explanation:

We will use slope-intercept form of equation to write our equation. The equation of a line in slope-intercept form is: $y=mx+b$ , where m= Slope of the line, b= y-intercept.

To write the equation that represents the number of credits y on the cards after x games, we will find slope of our line.

We have been given that after playing 5 games we have 33 credits left. We play 4 more games and we have 21 credits left. So our points will be (5,33) and (9,21).

Let us substitute coordinates of our both given points in slope formula: $m=\frac{y_2-y_1}{x_2-x_1}$ ,