Question

Andre and Noah started tracking their savings at the same time. Andre started with $15 and deposits $5 per week. Noah started with $2.50 and deposits $7.50 per week. The graph of Noah's savings is given and his equation is y=7.5x+2.5, where x represents the number of weeks and y represents his savings.

Write the equation for Andre's savings and graph it alongside Noah's. What does the intersection point mean in this situation?

Answer 1

Answer:5x + 15
Plzzz trust I had the same answer as well and the question too thx

Answer 2

An equation and the intersection point of the two lines is required.

Andre's equation $y=5x+15$

The intersection point is $(5,40)$

This means that at 5 months both Andre and Noah will have a total of $40 savings.

Noah's equation

$y=7.5x+2.5$

x = Number of weeks

y = Savings

Andre's equation

$y=5x+15$

Let us find two points of each line

$x=0$

$y=2.5$

$(0,2.5)$

$y=0$

$x=-\dfrac{2.5}{7.5}=-0.33$

$(-0.33,0)$

$x=0$

$y=15$

$(0,15)$

$y=0$

$x=-\dfrac{15}{5}=-3$

$(-3,0)$

Draw lines through their respective points

The intersection point is $(5,40)$

This means that at 5 months both Andre and Noah will have a total of $40 savings.

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